MTP: Throw a NullPointerException if client is null in MtpCursor constructor
MTP: Throw a NullPointerException if client is null in MtpCursor constructor

Change-Id: Ia2a19ddcc5cacb54d9fcbe55bce1de1aed515424
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