Add unaudited exported flag to exposed runtime receivers

Android T allows apps to declare a runtime receiver as not exported
by invoking registerReceiver with a new RECEIVER_NOT_EXPORTED flag;
receivers registered with this flag will only receive broadcasts from
the platform and the app itself. However to ensure developers can
properly protect their receivers, all apps targeting T or later
registering a receiver for non-system broadcasts must specify either
the exported or not exported flag when invoking #registerReceiver;
if one of these flags is not provided, the platform will throw a
SecurityException. This commit updates all the exposed receivers
with a new RECEIVER_EXPORTED_UNAUDITED flag to maintain the existing
behavior of exporting the receiver while also flagging the receiver
for audit before the T release.

Bug: 161145287
Test: Build
Change-Id: Ie97372efebd8258d9a4c503771d55109a85e6ae9

src/com/android/settings/wifi/WifiEnabler.java

@@ -118,7 +118,8 @@ public class WifiEnabler implements SwitchWidgetController.OnSwitchChangeListene
     public void resume(Context context) {
         mContext = context;
         // Wi-Fi state is sticky, so just let the receiver update UI
-        mContext.registerReceiver(mReceiver, mIntentFilter);
+        mContext.registerReceiver(mReceiver, mIntentFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
         if (!mListeningToOnSwitchChange) {
             mSwitchWidget.startListening();
             mListeningToOnSwitchChange = true;

src/com/android/settings/wifi/WifiStatusTest.java

@@ -125,7 +125,8 @@ public class WifiStatusTest extends Activity {
         mWifiStateFilter.addAction(WifiManager.RSSI_CHANGED_ACTION);
         mWifiStateFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
 
-        registerReceiver(mWifiStateReceiver, mWifiStateFilter);
+        registerReceiver(mWifiStateReceiver, mWifiStateFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
 
         setContentView(R.layout.wifi_status_test);
 
@@ -157,7 +158,8 @@ public class WifiStatusTest extends Activity {
     @Override
     protected void onResume() {
         super.onResume();
-        registerReceiver(mWifiStateReceiver, mWifiStateFilter);
+        registerReceiver(mWifiStateReceiver, mWifiStateFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
     }
 
     @Override

src/com/android/settings/wifi/WifiSummaryUpdater.java

@@ -76,7 +76,8 @@ public final class WifiSummaryUpdater extends SummaryUpdater {
         if (register) {
             mWifiTracker.fetchInitialState();
             notifyChangeIfNeeded();
-            mContext.registerReceiver(mReceiver, INTENT_FILTER);
+            mContext.registerReceiver(mReceiver, INTENT_FILTER,
+                    Context.RECEIVER_EXPORTED_UNAUDITED);
         } else {
             mContext.unregisterReceiver(mReceiver);
         }

src/com/android/settings/wifi/calling/WifiCallingSettingsForSub.java

@@ -429,7 +429,8 @@ public class WifiCallingSettingsForSub extends SettingsPreferenceFragment
             mValidListener = true;
         }
 
-        context.registerReceiver(mIntentReceiver, mIntentFilter);
+        context.registerReceiver(mIntentReceiver, mIntentFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
 
         final Intent intent = getActivity().getIntent();
         if (intent.getBooleanExtra(Phone.EXTRA_KEY_ALERT_SHOW, false)) {

src/com/android/settings/wifi/tether/WifiTetherSettings.java

@@ -147,7 +147,8 @@ public class WifiTetherSettings extends RestrictedDashboardFragment
         }
         final Context context = getContext();
         if (context != null) {
-            context.registerReceiver(mTetherChangeReceiver, TETHER_STATE_CHANGE_FILTER);
+            context.registerReceiver(mTetherChangeReceiver, TETHER_STATE_CHANGE_FILTER,
+                    Context.RECEIVER_EXPORTED_UNAUDITED);
         }
     }
 

src/com/android/settings/wifi/tether/WifiTetherSwitchBarController.java

@@ -83,7 +83,8 @@ public class WifiTetherSwitchBarController implements
     public void onStart() {
         mDataSaverBackend.addListener(this);
         mSwitch.setOnClickListener(this);
-        mContext.registerReceiver(mReceiver, WIFI_INTENT_FILTER);
+        mContext.registerReceiver(mReceiver, WIFI_INTENT_FILTER,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
     }
 
     @Override