Export LibraryActivity so it can be started by "make run".
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c7a61e7..40d54c9 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -9,7 +9,7 @@
 		>
 		<activity
 			android:name=".LibraryActivity"
-			android:exported="false"
+			android:exported="true"
 			>
 			<intent-filter>
 				<action android:name="android.intent.action.MAIN" />