Fix KeepalivePacketDataUtilTest crash on eng build

The test causes a Log.wtf to be logged, because it tests a method that
should not be used after R. Mock the terrible failure handler to avoid
crashes on eng builds.

Test: atest KeepalivePacketDataUtilTest

Change-Id: Ic06a0db7fefb4acf38b66feba9b47e21f9927b1c
1 file changed