LineageParts: adaptive icon

Change-Id: I72235f9c64847f2b906fdb975468d9f16deb8320
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6e2cd9b..e74e9eb 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -45,6 +45,7 @@
     <protected-broadcast android:name="org.lineageos.lineageparts.gestures.UPDATE_SETTINGS" />
 
     <application android:label="@string/lineageparts_title"
+            android:icon="@mipmap/ic_launcher"
             android:theme="@style/Theme.Settings"
             android:hardwareAccelerated="true"
             android:supportsRtl="true"