configs: Add ahal feature configs

- Add ahal feature configs to be read by config store.
  These flags will be read during ahal init and queried
  by different modules within ahal to make decisions
  based on whether feature is enabled or disabled.
- Re-group properties and flags per client.
- Add ahal feature configs for pixel.

Change-Id: Ia2270709f857f40cbaf8f345a9dca140033f9938