CCodec: fix corner cases

- Catch invalid createInputSurface requests.
- Move buffer allocation from setComponent() to start().
- Reset input surface at stop().
- Ignore flushed work.

Bug: 74073134
Test: adb shell setprop debug.stagefright.ccodec yes
Test: adb shell setprop debug.stagefright.omx_default_rank 1000
Test: adb shell killall mediaserver
Test: atest android.media.cts.MediaCodecTest
Change-Id: If95d3050e14fa9592d7eff4136a57326008455a0