gralloc.cpp

This is not a must and adds confusion between
OpenGL (supported) and Vulkan (not supported)
they are mixed (e.g. AHardwareBuffer_allocate
which goes though OpenGL)

Bug: 131184223
Test: lunch sdk_gphone_x86-userdebug
Test: emulator -wipe-data -no-snapshot -show-kernel -feature Vulkan,GLDirectMem
Test: ./android-cts/tools/cts-tradefed -- run cts -m CtsGraphicsTestCases
Test: emulator -wipe-data -no-snapshot -feature GLESDynamicVersion,PlayStoreImage,KernelDeviceTreeBlobSupport -gpu host
Test: ./android-cts/tools/cts-tradefed -- run cts -m CtsNativeHardwareTestCases
Test: ./android-cts/tools/cts-tradefed -- run cts -m CtsGraphicsTestCases
Test: ./android-cts/tools/cts-tradefed -- run cts -m CtsCameraTestCases
Change-Id: Idb5d5885efd18219c86cc1b76722d41f49d68d03
Merged-In: Ie6f40c717a36ae4a9ef477cc420dc083b63ffbc3
Signed-off-by: Roman Kiryanov <rkir@google.com>