RTT: Synchronous rendering notice dialog added

shell/android-studio/reicast/src/main/java/com/reicast/emulator/MainActivity.java

@@ -339,6 +339,13 @@ public class MainActivity extends AppCompatActivity implements
 		builder.show();
 	}
 
+	public void synchronousRenderingNotice() {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setMessage(R.string.synchronous_rendering_notice);
+		builder.create();
+		builder.show();
+	}
+
 	@Override
 	public void onConfigurationChanged(Configuration newConfig) {
 		super.onConfigurationChanged(newConfig);

shell/android-studio/reicast/src/main/java/com/reicast/emulator/config/OptionsFragment.java

@@ -72,6 +72,7 @@ public class OptionsFragment extends Fragment {
 		void recreateActivity();
 		void onMainBrowseSelected(String path_entry, boolean games, String query);
 		void launchBIOSdetection();
+		void synchronousRenderingNotice();
 	}
 
 	@Override  @SuppressWarnings("deprecation")
@@ -388,6 +389,9 @@ public class OptionsFragment extends Fragment {
 		rtt_spnr.setOnItemSelectedListener(new OnItemSelectedListener() {
 			public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
 				mPrefs.edit().putInt(Emulator.pref_rtt, pos).apply();
+				if (pos == 4) {
+					mCallback.synchronousRenderingNotice();
+				}
 			}
 
 			public void onNothingSelected(AdapterView<?> arg0) {

shell/android-studio/reicast/src/main/res/values-pl/strings.xml

@@ -65,4 +65,6 @@
     <string name="about">O nas</string>
     <string name="rateme">Oceń nas</string>
 
+    <string name="synchronous_rendering_notice">Zalecane jest także włączenie opcji `Synchronous Rendering`</string>
+
 </resources>

shell/android-studio/reicast/src/main/res/values/strings.xml

@@ -182,4 +182,7 @@
     <string name="popup_button_audio">Emu Sound</string>
     <string name="popup_button_turbo">Turbo</string>
     <string name="textview">disk_loading</string>
-</resources>
+
+    <string name="synchronous_rendering_notice">It is recommended to enable `Synchronous Rendering` option as well</string>
+
+</resources>