For #21126: process performancetest intent for AC too.

app/src/main/java/org/mozilla/fenix/perf/Performance.kt

@@ -37,19 +37,24 @@ object Performance {
     }
 
     /**
-     * The checks for the USB connections and ADB debugging are checks in case another application
+     * The checks for the charging state and ADB debugging are checks in case another application
      * tries to leverage this intent to trigger a code path for Firefox that shouldn't be used unless
      * it is for testing visual metrics. These checks aren't full proof but most of our users won't have
-     * ADB on and USB connected at the same time when running Firefox.
+     * ADB on and charging at the same time when running Firefox.
      */
     private fun isPerformanceTest(intent: Intent, context: Context): Boolean {
         if (!intent.getBooleanExtra(EXTRA_IS_PERFORMANCE_TEST, false)) {
             return false
         }
+
         val batteryStatus = context.registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
         batteryStatus?.let {
-            val isPhonePlugged = it.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) ==
-                BatteryManager.BATTERY_PLUGGED_USB
+            // We only run perf tests when the device is connected to USB. However, AC may be reported
+            // instead if the device is connected through a USB hub so we check both states.
+            val extraPlugged = it.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1)
+            val isPhonePlugged = extraPlugged == BatteryManager.BATTERY_PLUGGED_USB ||
+                extraPlugged == BatteryManager.BATTERY_PLUGGED_AC
+
             val isAdbEnabled = AndroidSettings.Global.getInt(
                 context.contentResolver,
                 AndroidSettings.Global.ADB_ENABLED, 0