Fix Android bugs (#941)

* Add an explicit value for the hasFragileUserData parameter

* Fix app crashes when canceling file opening

* Fix requestNetwork bug for Android 11

* Fix activity onStop method

client/android/AndroidManifest.xml

@@ -38,6 +38,7 @@
         android:theme="@style/NoActionBar"
         android:fullBackupContent="@xml/backup_content"
         android:dataExtractionRules="@xml/data_extraction_rules"
+        android:hasFragileUserData="false"
         tools:targetApi="s">
 
         <activity

client/android/src/org/amnezia/vpn/AmneziaActivity.kt

@@ -231,7 +231,10 @@ class AmneziaActivity : QtActivity() {
     override fun onStop() {
         Log.d(TAG, "Stop Amnezia activity")
         doUnbindService()
-        QtAndroidController.onServiceDisconnected()
+        mainScope.launch {
+            qtInitialized.await()
+            QtAndroidController.onServiceDisconnected()
+        }
         super.onStop()
     }
 
@@ -543,7 +546,7 @@ class AmneziaActivity : QtActivity() {
                 }
             }.also {
                 startActivityForResult(it, OPEN_FILE_ACTION_CODE, ActivityResultHandler(
-                    onSuccess = {
+                    onAny = {
                         val uri = it?.data?.toString() ?: ""
                         Log.d(TAG, "Open file: $uri")
                         mainScope.launch {

client/android/utils/src/main/kotlin/net/NetworkState.kt

@@ -88,16 +88,24 @@ class NetworkState(
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
             connectivityManager.registerBestMatchingNetworkCallback(networkRequest, networkCallback, handler)
         } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            try {
-                connectivityManager.requestNetwork(networkRequest, networkCallback, handler)
-            } catch (e: SecurityException) {
-                Log.e(TAG, "Failed to bind network listener: $e")
-                // Android 11 bug: https://issuetracker.google.com/issues/175055271
-                if (e.message?.startsWith("Package android does not belong to") == true) {
-                    delay(1000)
+            val numberAttempts = 3
+            var attemptCount = 0
+            while(true) {
+                try {
                     connectivityManager.requestNetwork(networkRequest, networkCallback, handler)
-                } else {
-                    throw e
+                    break
+                } catch (e: SecurityException) {
+                    Log.e(TAG, "Failed to bind network listener: $e")
+                    // Android 11 bug: https://issuetracker.google.com/issues/175055271
+                    if (e.message?.startsWith("Package android does not belong to") == true) {
+                        if (++attemptCount > numberAttempts) {
+                            throw e
+                        }
+                        delay(1000)
+                        continue
+                    } else {
+                        throw e
+                    }
                 }
             }
         } else {