192b591cdc
In DrmManager, we currently lock both processDrmInfo() and onInfo() which is
ok for now since processDrmInfo() is async call, and it will return without
waiting for onInfo() call. However, if we send an event in processDrmInfo(),
we will got deadlock here because we need to invoke onInf() which will wait
for processDrmInfo() to release the lock. Use different lock for onInfo().
- Remove some redundent mutex lock.
Change-Id: I59c794f95ba1693425723224114fa975cf9b235f