Find mime from file extension if the mime is empty
Find mime from file extension if the mime is empty

Fix for bug 3170039

Change-Id: I6d32ae157ec276575aad8fbcd73f02c48fe219d0

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base