Create System Property to Indicate ANGLE Support

Create the system property ro.gfx.angle.supported that indicates if the
device supports ANGLE.   The current planned use of this property is to
allow CTS to validate ANGLE functionality if the device indicates ANGLE
is supported.

Bug: 80239516
Test: Flash the build and verify the property is 'false' for marlin.
Test: Flash the build and verify the property is 'true' for walleye.
Change-Id: I00387db9ade34152f79d75453ea17d5ea7b063cd

prebuilts/api/28.0/public/property_contexts

@@ -101,6 +101,7 @@ ro.crypto.scrypt_params u:object_r:exported2_vold_prop:s0 exact string
 ro.dalvik.vm.native.bridge u:object_r:exported_dalvik_prop:s0 exact string
 ro.enable_boot_charger_mode u:object_r:exported3_default_prop:s0 exact bool
 ro.gfx.driver.0 u:object_r:exported3_default_prop:s0 exact string
+ro.gfx.angle.supported u:object_r:exported3_default_prop:s0 exact bool
 ro.hdmi.device_type u:object_r:exported3_default_prop:s0 exact string
 ro.hdmi.wake_on_hotplug u:object_r:exported3_default_prop:s0 exact bool
 ro.oem_unlock_supported u:object_r:exported3_default_prop:s0 exact int

public/property_contexts

@@ -111,6 +111,7 @@ ro.crypto.volume.filenames_mode u:object_r:exported2_vold_prop:s0 exact string
 ro.dalvik.vm.native.bridge u:object_r:exported_dalvik_prop:s0 exact string
 ro.enable_boot_charger_mode u:object_r:exported3_default_prop:s0 exact bool
 ro.gfx.driver.0 u:object_r:exported3_default_prop:s0 exact string
+ro.gfx.angle.supported u:object_r:exported3_default_prop:s0 exact bool
 ro.hdmi.device_type u:object_r:exported3_default_prop:s0 exact string
 ro.hdmi.wake_on_hotplug u:object_r:exported3_default_prop:s0 exact bool
 ro.lmk.critical_upgrade u:object_r:exported3_default_prop:s0 exact bool