Fix NPE: due to race condition between KCM package update

Not reproducible bug, possible cause of the bug is Gboard
package getting updated while PK connected causing the keyboard
notification using stale KCM descriptor which points to no KCM file.

Bug: 349033234
Test: None
Flag: EXEMPT bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:123a55e96bdc6321ef9df9bb6192ab1fd9042c1d)
Merged-In: I946848ab7b03945c9c1a234a18ba8ca9db3c86e6
Change-Id: I946848ab7b03945c9c1a234a18ba8ca9db3c86e6
1 file changed