Further increase FORCE_PAUSE_TIMEOUT in tests

- Test result has been improved by ag/15455154, but flakiness still exist, further increase the timeout to see if it helps

Bug: 194114179
Test: atest NexusLauncherOutOfProcTests:com.android.launcher3.memory.MemoryTests#testAppLaunchFromWorkspace
Change-Id: I0421a969a30d9c8b259aeb21059e2219f43174f7