Try to clear memory before running test.

Tests will fail if the low memory killer kills the test job since
JobService.onStopJob() will never be called. Try to clear memory before
we run the test to reduce the chance of a low memory kill on the device.

Bug: 183818187
Bug: 184214747
Test: atest --rerun-until-failure 50 CtsJobSchedulerTestCases:JobThrottlingTest
Change-Id: Ic6819da695b79cb502df38474641e9568b63d3b2
1 file changed