Sunset sentry-android-okhttp in favor of sentry-okhttp

[romtsn]

Description

Since we have introduced pure jvm sentry-okhttp module in 7.0.0, we need to sunset its predecessor eventually:

• auto-install sentry-okhttp instead of sentry-android-okhttp when the sdk version is 7.0 and above
• auto-instrument using io.sentry.okhttp instead of io.sentry.android.okhttp classes when the sdk version is 7.0 and above
• update docs https://docs.sentry.io/platforms/android/integrations/okhttp/

[kahest]

@stefanosiano is this done?