Fixing Robolectic model tests

Some tests were broken because of refactoring in LauncherModel.

Change-Id: I55aa32d75a4d16338796a1b1765717fd72ba4b33
diff --git a/robolectric_tests/Android.mk b/robolectric_tests/Android.mk
index 3fa9b0a..836ded5 100644
--- a/robolectric_tests/Android.mk
+++ b/robolectric_tests/Android.mk
@@ -59,4 +59,4 @@
 
 LOCAL_ROBOTEST_TIMEOUT := 36000
 
-include prebuilts/misc/common/robolectric/4.3.1/run_robotests.mk
+include prebuilts/misc/common/robolectric/4.4/run_robotests.mk