Fix QS header constraints so status icons are now ellipsized where there

is lack of space.

Previously:
There was a chain [date]-[space]-[status icons]-[battery]. That's why we should add bias and space to make it working.
But there're several problems with this:
 1) app:layout_width="WRAP_CONTENT" + app:layout_constrainedWidth=”true" != app:layout_width="0dp" + app:layout_constraintWidth_default="wrap". The first one gets view expanded like it's MATCH_PARENT.
 2) I've found out that wrapping views in constraint layout 2.0.0 may not always work as expected with app:layout_constrainedWidth=”true" (the view get's stretched as it's match_parent). layout_constraintWidth_max="wrap" should've help with this, but motion layout can't parse this attribute in constraint set. That's why my solution is to reimplement the layout a little bit
This behavior is reported here: androidx/constraintlayout#713

Now:
[date] and [battery] are constrained to the sides and [status icons] occupy the whole space between them.
[date] is always WRAP_CONTENT because there's always some space and we want to show it.
[battery] and [status icons] are wrap content with constraints restrictions to make them fill all the space left

Test: manual: phone + tablet
Fixes: 260364389
Change-Id: I4d54b795cc4e96f6c204f2f00aff7607572d9aa3
(cherry picked from commit 675ff0f)
Merged-In: I4d54b795cc4e96f6c204f2f00aff7607572d9aa3

packages/SystemUI/res/layout/combined_qs_header.xml

@@ -148,9 +148,4 @@
         <include layout="@layout/ongoing_privacy_chip"/>
     </FrameLayout>
 
-    <Space
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        android:id="@+id/space"
-    />
 </com.android.systemui.util.NoRemeasureMotionLayout>

packages/SystemUI/res/xml/qs_header.xml

@@ -56,13 +56,9 @@
         <Layout
             android:layout_width="wrap_content"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
-            app:layout_constrainedWidth="true"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintEnd_toStartOf="@id/space"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintTop_toBottomOf="@id/carrier_group"
-            app:layout_constraintHorizontal_bias="0"
-            app:layout_constraintHorizontal_chainStyle="spread_inside"
         />
     </Constraint>
 
@@ -87,39 +83,27 @@
     <Constraint
         android:id="@+id/statusIcons">
         <Layout
-            android:layout_width="wrap_content"
+            android:layout_width="0dp"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
-            app:layout_constraintStart_toEndOf="@id/space"
+            app:layout_constraintWidth_default="wrap"
+            app:layout_constraintStart_toEndOf="@id/date"
             app:layout_constraintEnd_toStartOf="@id/batteryRemainingIcon"
             app:layout_constraintTop_toTopOf="@id/date"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintHorizontal_bias="1"
+            app:layout_constraintBottom_toBottomOf="@id/date"
             />
     </Constraint>
 
     <Constraint
         android:id="@+id/batteryRemainingIcon">
         <Layout
-            android:layout_width="wrap_content"
+            android:layout_width="0dp"
             android:layout_height="@dimen/new_qs_header_non_clickable_element_height"
+            app:layout_constraintWidth_default="wrap"
             app:layout_constraintHeight_min="@dimen/new_qs_header_non_clickable_element_height"
-            app:layout_constraintStart_toEndOf="@id/statusIcons"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="@id/date"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintHorizontal_bias="1"
-            app:layout_constraintHorizontal_chainStyle="spread_inside"
+            app:layout_constraintBottom_toBottomOf="@id/date"
             />
     </Constraint>
 
-
-    <Constraint
-        android:id="@id/space">
-        <Layout
-            android:layout_width="0dp"
-            android:layout_height="0dp"
-            app:layout_constraintStart_toEndOf="@id/date"
-            app:layout_constraintEnd_toStartOf="@id/statusIcons"
-            />
-    </Constraint>
 </ConstraintSet>

packages/SystemUI/tests/src/com/android/systemui/shade/CombinedShadeHeaderConstraintsTest.kt

@@ -17,6 +17,7 @@
 package com.android.systemui.shade
 
 import android.testing.AndroidTestingRunner
+import android.view.ViewGroup
 import androidx.constraintlayout.widget.ConstraintSet
 import androidx.constraintlayout.widget.ConstraintSet.PARENT_ID
 import androidx.constraintlayout.widget.ConstraintSet.START
@@ -92,12 +93,12 @@ class CombinedShadeHeaderConstraintsTest : SysuiTestCase() {
             assertThat(getConstraint(R.id.clock).layout.horizontalBias).isEqualTo(0f)
 
             assertThat(getConstraint(R.id.date).layout.startToStart).isEqualTo(PARENT_ID)
-            assertThat(getConstraint(R.id.date).layout.horizontalBias).isEqualTo(0f)
+            assertThat(getConstraint(R.id.date).layout.horizontalBias).isEqualTo(0.5f)
 
             assertThat(getConstraint(R.id.batteryRemainingIcon).layout.endToEnd)
                 .isEqualTo(PARENT_ID)
             assertThat(getConstraint(R.id.batteryRemainingIcon).layout.horizontalBias)
-                .isEqualTo(1f)
+                .isEqualTo(0.5f)
 
             assertThat(getConstraint(R.id.privacy_container).layout.endToEnd)
                 .isEqualTo(R.id.end_guide)
@@ -331,10 +332,8 @@ class CombinedShadeHeaderConstraintsTest : SysuiTestCase() {
         val views = mapOf(
                 R.id.clock to "clock",
                 R.id.date to "date",
-                R.id.statusIcons to "icons",
                 R.id.privacy_container to "privacy",
                 R.id.carrier_group to "carriers",
-                R.id.batteryRemainingIcon to "battery",
         )
         views.forEach { (id, name) ->
             assertWithMessage("$name has 0 height in qqs")
@@ -352,11 +351,8 @@ class CombinedShadeHeaderConstraintsTest : SysuiTestCase() {
     fun testCheckViewsDontChangeSizeBetweenAnimationConstraints() {
         val views = mapOf(
                 R.id.clock to "clock",
-                R.id.date to "date",
-                R.id.statusIcons to "icons",
                 R.id.privacy_container to "privacy",
                 R.id.carrier_group to "carriers",
-                R.id.batteryRemainingIcon to "battery",
         )
         views.forEach { (id, name) ->
             expect.withMessage("$name changes height")
@@ -369,8 +365,8 @@ class CombinedShadeHeaderConstraintsTest : SysuiTestCase() {
     }
 
     private fun Int.fromConstraint() = when (this) {
-        -1 -> "MATCH_PARENT"
-        -2 -> "WRAP_CONTENT"
+        ViewGroup.LayoutParams.MATCH_PARENT -> "MATCH_PARENT"
+        ViewGroup.LayoutParams.WRAP_CONTENT -> "WRAP_CONTENT"
         else -> toString()
     }