Fix numPadAnimator bug when colorControlNormal isn't found.

This resulted in the enter and delete buttons with wrong colors in keyguard.

Test: manually
Bug: 383230490
Flag: EXEMPT bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:bd9f5b1fbe9b272ebeecf80f5ed17bbc3ede1e14)
Merged-In: Iec4f8a2ccb97e8f7a50731555e1d1849090c550f
Change-Id: Iec4f8a2ccb97e8f7a50731555e1d1849090c550f