Add debug log mechanism to OomAdjsuter

Example:
```
adb shell device_config put activity_manager proc_state_debug_uids '10177,10202,stack,p500,u100'
```
means:
- Monitor UID 10177 and 10202
- Also enable stack trace
- Sleep 500 ms when updating the procstate.
- Sleep 100 ms when updating the UID state.

Test: manual test with `device_config put`
Bug: 329505886
Change-Id: Iad1aec6fcfc16a3085a991bae42780d067ee031f