Adopt robolectric 3.6.1

Bug: 71596155
Test: make RunSettingsLibRoboTests
Change-Id: I0f8e538238c42fed89bc4778a6a717f2eddac9b7
diff --git a/services/robotests/Android.mk b/services/robotests/Android.mk
index 1ca6f26..ae311f8 100644
--- a/services/robotests/Android.mk
+++ b/services/robotests/Android.mk
@@ -49,7 +49,7 @@
 
 LOCAL_JAVA_LIBRARIES := \
     junit \
-    platform-robolectric-3.5.1-prebuilt
+    platform-robolectric-3.6.1-prebuilt
 
 LOCAL_INSTRUMENTATION_FOR := FrameworksServicesLib
 LOCAL_MODULE := FrameworksServicesRoboTests
@@ -74,4 +74,4 @@
 
 LOCAL_INSTRUMENT_SOURCE_DIRS := $(dir $(LOCAL_PATH))backup/java
 
-include prebuilts/misc/common/robolectric/3.5.1/run_robotests.mk
+include prebuilts/misc/common/robolectric/3.6.1/run_robotests.mk