Don't attempt caching for BiometricManager.Strings

Always fetch the latest requested string when a getter method of
BiometricManager.Strings is called, rather than attempted to cache the
strings.

Test: atest BiometricManagerTest

Fixes: 192573011
Change-Id: Ic73e2d0092d200e5912084e1b8f4efdb81bbf2d8
1 file changed