Update ANGLE Developer Options

Update ANGLE developer options to allow selecting the OpenGL driver
(default, ANGLE, native) for each app as well as forcing ANGLE for all
apps.

The settings are also being moved from within the Android settings (here)
to the ANGLE APK, so they can be updated more quickly/easily.

Bug: 118384925
Test: Verify the default/ANGLE/native values are saved and applied and
used by the loader.

Change-Id: Ide449704dd703657bd316231987a07becf8699c9