Don't route intents for MANAGE_NETWORK_USAGE settings

This is because we require a special permission to launch this intent
and we prefer requiring this permission to having the NavDrawerActivity
added to the back stack.

This commit also re-adds the deprecated USE_FINGERPRINT permission as
Android Studio would show an error otherwise.

briar-android/src/main/AndroidManifest.xml

@@ -21,6 +21,8 @@
 	<uses-permission android:name="android.permission.CAMERA"/>
 	<uses-permission android:name="android.permission.INTERNET"/>
 	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+	<!--suppress DeprecatedClassUsageInspection -->
+	<uses-permission android:name="android.permission.USE_FINGERPRINT"/>
 	<uses-permission android:name="android.permission.VIBRATE"/>
 	<uses-permission android:name="android.permission.WAKE_LOCK"/>
 	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
@@ -104,11 +106,6 @@
 			android:name="org.briarproject.briar.android.navdrawer.NavDrawerActivity"
 			android:launchMode="singleTask"
 			android:theme="@style/BriarTheme.NoActionBar">
-
-			<intent-filter>
-				<action android:name="android.intent.action.MANAGE_NETWORK_USAGE"/>
-				<category android:name="android.intent.category.DEFAULT"/>
-			</intent-filter>
 			<intent-filter android:label="@string/add_contact_remotely_title_case">
 				<action android:name="android.intent.action.VIEW"/>
 
@@ -122,7 +119,6 @@
 				<category android:name="android.intent.category.DEFAULT"/>
 				<data android:mimeType="text/plain"/>
 			</intent-filter>
-
 		</activity>
 
 		<activity
@@ -364,6 +360,10 @@
 			<meta-data
 				android:name="android.support.PARENT_ACTIVITY"
 				android:value="org.briarproject.briar.android.navdrawer.NavDrawerActivity"/>
+			<intent-filter>
+				<action android:name="android.intent.action.MANAGE_NETWORK_USAGE"/>
+				<category android:name="android.intent.category.DEFAULT"/>
+			</intent-filter>
 		</activity>
 
 		<activity

briar-android/src/main/java/org/briarproject/briar/android/activity/BriarActivity.java

@@ -66,6 +66,8 @@ public abstract class BriarActivity extends BaseActivity {
 			@Nullable Intent data) {
 		super.onActivityResult(request, result, data);
 		if (request == REQUEST_PASSWORD) {
+			// We get RESULT_CANCELED when the account gets deleted or
+			// StartupActivity finishes before entering the password.
 			if (result == RESULT_OK) briarController.startAndBindService();
 		} else if (request == REQUEST_UNLOCK && result != RESULT_OK) {
 			// We arrive here, if the user presses 'back'

briar-android/src/main/java/org/briarproject/briar/android/navdrawer/IntentRouter.java

@@ -5,9 +5,7 @@ import android.content.Intent;
 
 import org.briarproject.briar.android.activity.BriarActivity;
 import org.briarproject.briar.android.contact.add.remote.AddContactActivity;
-import org.briarproject.briar.android.settings.SettingsActivity;
 
-import static android.content.Intent.ACTION_MANAGE_NETWORK_USAGE;
 import static android.content.Intent.ACTION_SEND;
 import static android.content.Intent.ACTION_VIEW;
 import static android.content.Intent.EXTRA_TEXT;
@@ -29,10 +27,6 @@ class IntentRouter {
 				LINK_REGEX.matcher(i.getStringExtra(EXTRA_TEXT)).find()) {
 			redirect(ctx, i, AddContactActivity.class);
 		}
-		// network settings as launched from system settings app
-		else if (ACTION_MANAGE_NETWORK_USAGE.equals(action)) {
-			redirect(ctx, i, SettingsActivity.class);
-		}
 	}
 
 	private static void redirect(Context ctx, Intent i,