Add test case that loading font files in another package

This is 2nd attempt of If190e6a163d2e294339265908e5eb594601de84b

The diff from the original CL is disabling test case on instant
apps since instant app cannot interact with other package's resource.

Bug: 179461812
Test: atest FontResourceTest
Test: atest FontResourceTest --instant // the test case is excluded.
Change-Id: I1b2652f54c506db73cc001bfcb9e75e5816a7c58
(cherry picked from commit 632ebb1911d451a9a2d42770f400e75976a57854)