libui: Allow extension of valid gralloc 1.0 buffer usage bits

* Change I7f4174581e24e361577640b9263514a168ed482d implemented
  validation of the buffer description info prior to creating
  the descriptor. Some of our legacy devices need to whitelist
  additional usage bits to support various functionality.

Change-Id: Ie369e78f78e9ac0b18ab3dfea520d4f123005d92

libui: Extend adb95ae5 to Gralloc3

Change-Id: I96a9f86f5c834a4282a172e7134422caf560b238