Restartless native Fennec add-on to set testing prefs for Firefox
Health Report upload feature.

Based on cscott/skeleton-addon-fxandroid and
mozilla-services/product-announcements-test-addon.

What to do:

* Edit config_build.sh to set ANDROID_APP_ID to the product you're
  testing (e.g., org.mozilla.fennec_$USER).

* Edit bootstrap.js, setting ANNO_URL to the server URL and
  ANNO_INTERVAL to the check interval in milliseconds.

* Run build.sh with your device connected and reachable over ADB.

Ask nalexander or rnewman if you have other questions.