GraphicsEnvironment: Check ANGLE allowList after settings

Add a string array to config.xml containing apps that should
use ANGLE.  The real values come from device specific overlays.

Use the list after checking settings, allowing settings to
override the values.

Flag: android.os.enable_angle_allow_list
Test: Manual, flash on Pixel 7 and boots
Bug: b/370845648
Change-Id: Ia58b7371f38f8ee73401784d20f0aa80a41db568