Update tlsextprovider example with modern API target

tlsexternalcertprovider/build.gradle

@@ -10,13 +10,13 @@ ext {
 }
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 34
 
 
     defaultConfig {
         applicationId "de.blinkt.externalcertprovider"
-        minSdkVersion 16
-        targetSdkVersion 27
+        minSdkVersion 21
+        targetSdkVersion 34
         versionCode 1
         versionName "1.0"
 

tlsexternalcertprovider/src/androidTest/java/de/blinkt/externalcertprovider/ExampleInstrumentedTest.java

@@ -1,31 +0,0 @@
-/*
- * Copyright (c) 2012-2018 Arne Schwabe
- * Distributed under the GNU GPL v2 with additional terms. For full terms see the file doc/LICENSE.txt
- */
-
-package de.blinkt.externalcertprovider;
-
-import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import static org.junit.Assert.*;
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-    @Test
-    public void useAppContext() {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getTargetContext();
-
-        assertEquals("de.blinkt.externalcertprovider", appContext.getPackageName());
-    }
-}

tlsexternalcertprovider/src/main/AndroidManifest.xml

@@ -32,8 +32,7 @@
         </activity>
 
 
-        <service android:name=".ExternalCertService"
-                tools:ignore="ExportedService">
+        <service android:name=".ExternalCertService" android:exported="true">
             <intent-filter>
                 <action android:name="de.blinkt.openvpn.api.ExternalCertificateProvider"/>
             </intent-filter>