fix [4107131] nvidia driver call takes a very long time
fix [4107131] nvidia driver call takes a very long time

We were leaking all EGLSyncKHR objects, over time the list
would grow and become very slow to operate on.

Bug: 4107131
Change-Id: I6c82daf49fe3189d04550781d64d57c30c95f552

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base