Remove usage of a hidden API from ContentResolverTest

ContentResolverTest uses a hidden API that is executed inside a Binder
IPC call and thus is not exempt from enforcement list the rest of the test.
Remove this usage, as it is a simple MathUtils function that can be
easily inlined.

Bug: 77533290
Test: cd cts/tests/tests/content ; atest .
Change-Id: Ief5a00c816a4fa7043048e2ba7bec2a402066984
1 file changed