CCodec: graphic C2Buffer lifecycle management hacks

Bug: 74077399
Test: adb shell setprop debug.stagefright.ccodec yes
Test: adb shell stagefright -S -N c2.google.avc.decoder /sdcard/a.mp4
Change-Id: I57d86f78569bf743a5d5ffd08c48559f6aa12e76
(cherry picked from commit ae90834e)