BluetoothPairingRequest: Add null check for action

Bug: 159728132
Test: Build

Change-Id: I24668e20accf96c7469c9e1ab589b1383ab59d18
Merged-In: I24668e20accf96c7469c9e1ab589b1383ab59d18
(cherry picked from commit 1805f666e7a88ce879dd3c281cbb8d0696c3e174)
1 file changed