This commit adds the necessary code for 'adb_utils' to enable APF
multi-device testing which will be introduced in follow-up patches.
This includes utilities of issuing shell command, parsing dumpsys
key-value pairs, controlling doze mode and screen state.
Additionally, unit tests are added to verify the basic functionality.
Test: atest NetworkStaticLibHostPythonTests
Bug: 335368434
Change-Id: I580e91b494580ec9105c8988972845d38c104031
Junyu Lai
commited