Use Flags and SystemProperties on debug builds.
This will allow us to turn the feature on and off using `adb` commands
without rebuilding.
We'll limit this to debug builds to be safe.
After this CL, the feature can be enabled with:
```
adb shell setprop \
persist.sys.com.android.server.display.feature.flags.enable_connected_display_management \
true && adb reboot
```
Test: Manually tested that changing the flag enable the feature
Bug: 297159910
Change-Id: I5bcc03183cef047ae4ed3c1c0fff9450bbe996dd
1 file changed