SimulatdDpad: fix NPE for event without device
SimulatdDpad: fix NPE for event without device

Fix a rare case that We lost device(due to network issue)
and SimulatedDpad received the MotionEvent without device.

b/8121964

Change-Id: Ie2948e6ff14a84422b05dda8ea87a3571f26f252

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