Bump TunneledWebView sample app target SDK to 29

MobileLibrary/Android/SampleApps/TunneledWebView/app/build.gradle

@@ -1,14 +1,14 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 29
     useLibrary 'org.apache.http.legacy'
 
 
     defaultConfig {
         applicationId "ca.psiphon.tunneledwebview"
         minSdkVersion 15
-        targetSdkVersion 28
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
     }
@@ -36,7 +36,7 @@ repositories {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     testImplementation 'junit:junit:4.12'
-    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
     // always specify exact library version in your real project to avoid non-deterministic builds
     implementation 'ca.psiphon:psiphontunnel:2.+'
 }

MobileLibrary/Android/SampleApps/TunneledWebView/app/src/main/java/ca/psiphon/tunneledwebview/MainActivity.java

@@ -7,7 +7,7 @@ package ca.psiphon.tunneledwebview;
 
 import android.content.Context;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.widget.ArrayAdapter;

MobileLibrary/Android/SampleApps/TunneledWebView/gradle.properties

@@ -15,4 +15,6 @@
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
-# org.gradle.parallel=true
+# org.gradle.parallel=true
+android.enableJetifier=true
+android.useAndroidX=true