Add launcher drag example

examples/helper/launcher-drag-youtube-icon.py

@@ -0,0 +1,12 @@
+#! /usr/bin/env python3
+
+from com.dtmilano.android.viewclient import ViewClient
+
+helper = ViewClient.view_client_helper()
+oid = helper.ui_device.find_object(ui_selector="desc@YouTube").oid
+t, l, r, b = helper.ui_object.get_bounds(oid=oid)
+s_x = int(l + (r - l)/2)
+s_y = int(t + (b - t)/2)
+e_x = 300
+e_y = 700
+helper.ui_device.drag(s_x, s_y, e_x, e_y, 50)