Add test for FP16 surface support

Test: adb shell /data/nativetest/EGL_test/EGL_test
      adb shell /system/bin/test-opengl-gl_basic # look for RED_SIZE: of 16.
Bug: 29940137

Change-Id: I9da985a7574d3582b06cf55bc02515db0869505a
2 files changed