Merge pull request #62 from guardianproject/sampleAPI30

Sample targets API 30 for #58

sampletorapp/build.gradle

 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 31
+    compileSdkVersion 30
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -9,7 +9,7 @@ android {
     defaultConfig {
         applicationId "org.torproject.android.sample"
         minSdkVersion 21
-        targetSdkVersion 31
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
     }