Nuke libagl and setEmulatorGlesValue

If you want a software GL for bringup or otherwise, use SwiftShader.

now emulator uses ro.hardware.egl in internal master at least (AOSP
needs ro.hardware.egl modernization)

Change-Id: I1b331c493ff0f1b4d904fea2d40f49c1fe497c28
34 files changed