Merge branch 'app-market-category' into 'master'

Add APP_MARKET category for MainActivity

See merge request fdroid/fdroidclient!1459

app/src/main/AndroidManifest.xml

@@ -285,7 +285,9 @@
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
+                <category android:name="android.intent.category.APP_MARKET" />
                 <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>