Add Rover to run_on_app_dump

Contents of README.google:
Name: Rover Android SDK
URL: https://github.com/RoverPlatform/rover-android
Version: NA
Revision: 94342117097770ea3ca2c6df6ab496a1a55c3ce7
Date: Aug 7, 2020
License: Apache License 2.0

Bug: 152155164
Change-Id: If035bdfbe1ba250e3ab73afebe4adc5741a4843e
diff --git a/third_party/opensource-apps/rover-android.tar.gz.sha1 b/third_party/opensource-apps/rover-android.tar.gz.sha1
new file mode 100644
index 0000000..043d3e4
--- /dev/null
+++ b/third_party/opensource-apps/rover-android.tar.gz.sha1
@@ -0,0 +1 @@
+50562618faf112ec73219488fa9b3705dc42a38e
\ No newline at end of file