Use latest library release.

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

@@ -34,5 +34,5 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     testImplementation 'junit:junit:4.12'
     implementation 'com.android.support:appcompat-v7:26.1.0'
-    implementation 'ca.psiphon:psiphontunnel:1.0.7'
+    implementation 'ca.psiphon:psiphontunnel:2.0.2'
 }