exoplayer bumped minsdk version to 19

Change-Id: I757d59fe781691188ab116abd777ffab9e135811
Merged-In: I359dd308d41dcba157c7fcd6fb09f5f470d1bddf
Bug: 307291543
(cherry picked from commit 20359810a6bac21d1a4dcf8902e486521ec44ae4)
1 file changed