C2SoftAvcEnc: Use dimensions from mSize instead of input buffer

Bug: 172908358
Test: poc in bug
Test: atest MediaTrackTranscoderTests
Test: atest CtsMediaV2TestCases

Change-Id: I84ffe9e93e782f40686db676bea7091966ff4dff
(cherry picked from commit 644a240842f8bdef443667bbd4bb172c7074a5b8)
1 file changed