media VTS: configure output buffer usage for video decoder tests

Default value of C2StreamUsageTuning::output is zero. If MD5 checksum
validation needs to be done, then configure this param to CPU_READ.

Bug: 304912297
Test: atest VtsHalMediaC2V1_0TargetVideoDecTest
Flag: TEST_ONLY
Change-Id: I7b2410f65859cd52e12dc39973d5c8b2d82dc597
1 file changed