Turn on feature flag and add sysprop for bt power telemetry

To set the flag, run the following command in a root shell:
```
adb shell setprop persist.device_config.aconfig_flags.bluetooth.com.android.bluetooth.flags.bluetooth_power_telemetry true
```

Bug: 237393639
Bug: 301874865
Test: atest net_test_osi
Change-Id: I0bd64d31a048315a7a6c9c6f4682ef3fa8f0d7a7