This PR adds LCEVC SEI tests to Shaka Player. It plays an LCEVC SEI
content for 6 seconds and checks LCEVCdec public APIs to verify that
LCEVC is enabled and LCEVC data was found in SEI.
Features for LCEVC Decoder integration into Shaka player:
Initially in this PR we had changes to shaka player to accommodate
changes for iOS fullscreen functionality. But now we have a way to do
that inside the scope of lcevc decoder. So the only change in this PR is
the version bump of the lcevc decoder library.