Use SkCodec::MinBufferedBytes() for front buffered image decode stream
Use SkCodec::MinBufferedBytes() for front buffered image decode stream

This should not change decode behavior, but it's worth noting that
the number of bytes buffered will decrease from 64 to 30.

Change-Id: I66b0e38a487c1786823b0125686b094dae5d13dc

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