MediaCodec can throw exceptions so catch them if needed.

BUG=b/11364276

Review URL: https://codereview.chromium.org/62763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239515 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239515