Add ComponentActivity to compose project's manifest file

This allows createComposeExtension() to work

Author: mannodermaus

instrumentation/compose/src/main/AndroidManifest.xml

@@ -1 +1,9 @@
-<manifest package="de.mannodermaus.junit5.compose"/>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.mannodermaus.junit5.compose">
+
+    <application>
+        <activity
+            android:name="androidx.activity.ComponentActivity"
+            android:exported="true" />
+    </application>
+</manifest>