Fixed unaligned KeyCharacterMap parcel read/write with null native object.

As we now allow KeyCharacterMap to have null native object, we must set
a flag for parcel object for null natvie object.  This fixed the
unaligned parcel read/write when the native object is null.

Bug: 175316710
Test: atest android.hardware.input.cts
Change-Id: I657e0dc4ecc91337ed4d621e72c3c27d85004a47
1 file changed