Use a separated Configuration instance to save the last state

Test: manual
Test: atest ControlsActivityTest
Fixes: 280500001
Change-Id: I8975b28a68c34cd27d4e53646d2b034a8edb97f9

packages/SystemUI/src/com/android/systemui/controls/ui/ControlsActivity.kt

@@ -57,14 +57,15 @@ open class ControlsActivity @Inject constructor(
     private val keyguardStateController: KeyguardStateController
 ) : ComponentActivity() {
 
+    private val lastConfiguration = Configuration()
+
     private lateinit var parent: ViewGroup
     private lateinit var broadcastReceiver: BroadcastReceiver
     private var mExitToDream: Boolean = false
-    private lateinit var lastConfiguration: Configuration
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        lastConfiguration = resources.configuration
+        lastConfiguration.setTo(resources.configuration)
         if (featureFlags.isEnabled(Flags.USE_APP_PANELS)) {
             window.addPrivateFlags(WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERLAY)
         }
@@ -105,7 +106,7 @@ open class ControlsActivity @Inject constructor(
         if (lastConfiguration.diff(newConfig) and interestingFlags != 0 ) {
             uiController.onSizeChange()
         }
-        lastConfiguration = newConfig
+        lastConfiguration.setTo(newConfig)
     }
 
     override fun onStart() {

packages/SystemUI/tests/src/com/android/systemui/controls/ui/ControlsActivityTest.kt

@@ -34,6 +34,7 @@ import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.Mock
+import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
 import org.mockito.MockitoAnnotations
 
@@ -108,6 +109,18 @@ class ControlsActivityTest : SysuiTestCase() {
         verify(uiController).onSizeChange()
     }
 
+    @Test
+    fun testConfigurationChangeSupportsInPlaceChange() {
+        val config = Configuration(activityRule.activity.resources.configuration)
+
+        config.orientation = switchOrientation(config.orientation)
+        activityRule.runOnUiThread { activityRule.activity.onConfigurationChanged(config) }
+        config.orientation = switchOrientation(config.orientation)
+        activityRule.runOnUiThread { activityRule.activity.onConfigurationChanged(config) }
+
+        verify(uiController, times(2)).onSizeChange()
+    }
+
     private fun switchOrientation(orientation: Int): Int {
         return if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
             Configuration.ORIENTATION_PORTRAIT