Add presubmit tests to gate ActivityManager and OomAdjuster changes.

OomAdjuster.java determines process state/capability, active/idle and other
things about the process. Add more tests to presubmit to gate OomAdjuster changes.

Bug: 272781597
Test: NA.
Change-Id: If2a8c01433c4bc618609ec66fa087554bff3e1bd