Bug: Bearing is inverted with LatLngBounds Update

[JGerdes]

When animating the camera via CameraUpdateFactory.newLatLngBounds(), bearing gets mirrored on north/south axis.
When applying the same CameraUpdate from CameraUpdateFactory.newLatLngBounds() multiple times, the bearing keep swapping between two values:

original bearing	bearing after re-applying update

Can be reproduced with all map.animateCamera(), map.easeCamera() and map.MoveCamera().

Steps to reproduce

1. Start map view with bearing set to 0 (north facing up)
2. Apply CameraUpdate obtained with CameraUpdateFactory.LatLngBounds()
3. Rotate map (changing it's bearing)
4. Apply new (or same, doesn't matter) CameraUpdate obtained with CameraUpdateFactory.LatLngBounds()

Expected behavior

Animating to same bounds as before with either keeping current bearing or resetting it to 0 (latter one used to be the behavior)

Actual behavior

Bearing seems to be mirrored on north-south axis (before second update: 42.27285333486378, after second update: 317.7271466651362).

Configuration

Android versions: Tested and reproduced on Android 8.0 and 4.4.2
Device models: One Plus 3T (Android 8.0), Nexus 5 Emulator (Android 4.4.2)
Mapbox SDK versions: 6.3.0

This bug might be related to/was introduced with #11993

[tobrun]

Thanks for the detailed report @JGerdes