MediaFile: Fix case sensitive file extension matching for computing MTP format code
MediaFile: Fix case sensitive file extension matching for computing MTP format code

Bug: 6939136

Change-Id: Iefd4083aefbd4b175a2f8c860a9e13c99ded9c82
Signed-off-by: Mike Lockwood <368d0007e4626f70737d16df5e49ed8806b98c3f@google.com>

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