Add new API to toggle ANGLE as the default system GLES driver

Bug:b/270994705
Test: Flash, verify Pixel 7 can boot.
Toggle the developer option switch.
adb shell getprop persist.graphics.egl is returning
right values with switch set on and off.

Change-Id: Idce453d79e97c48cc965900315799784a001e053
6 files changed