Use ConstraintLayout for BadgedImageView

App icon badge size is based on the view size, as a ratio.
Use ConstraintLayout to define the app icon size based on constraints.
This way we do not have to recalculate the app icon size manually.
If the BadgedImageView size changes, app icon will be resized automatically.
App icon badge position is fixed to the right. If it needs to be shown
on the left, due to bubble position, we update the location using
translationX.

Bug: 162857077
Test: verified visually that bubble with app icon looks the same
Test: verified visually that when display size changes, app icon changes
  together with bubble size
Test: ran WMShellUnitTests unit tests
Change-Id: I63a6cadfc7847dd0c0d9dca6bb6efd11f5b9958e