Properly dispose of EGL resources

Context and Surface should be destroyed before terminating display.
Call to eglTerminate caused bad memory access (bug in egl implementation),
and shouldn't be necessary so this cl removes that.

Also explicitly release vertex arrays in EglProgram.

Bug: 346736633
Test: atest virtual_camera_tests CtsVirtualDevicesCameraTestCases CtsVirtualDevicesCameraCtsTestCases
Change-Id: Ie5a2555391817de3a5446e25e50c9d85cf32cb65