Revert "Revert "Move libmediahelper into a new folder.""

This reverts commit a0877dc731067dd95635b2be3e893f1fe60bf3a1.

Reason for revert: Should work with go/pag/1465463 merging to master.

Change-Id: I17217744eacabf15621d4a5aac9dd1678e37e4ba
10 files changed