Remove code that checks appop history.

PermissionUsageFragment and PermissionControllerServiceImpl both
filter usages whose last usage is outside the specified interval and
those with an access count of zero.  The latter check always fails
when appop history is disabled, and since we are not currently showing
usage data, we can simply remove the check.

Fixes: 132638167
Test: View permissions screens with history enabled and disabled.
Change-Id: Iac72c92f508b453c453ebfd56a02baccaa43575e