Add ApiDemos to device-tests as it's needed by JankMicroBenchmarkTests

Bug: 35882476
Test: local test
make -j32 JankMicroBenchmarkTests ApiDemos  && \
tradefed.sh run template/local --template:map test=JankMicroBenchmarkTests \
      --test-tag testname --log-level-display VERBOSE

Change-Id: I6d6eceaaefa1d78656630e950022e3b1636b6f05
diff --git a/samples/ApiDemos/Android.mk b/samples/ApiDemos/Android.mk
index fedf65a..1d2d152 100644
--- a/samples/ApiDemos/Android.mk
+++ b/samples/ApiDemos/Android.mk
@@ -20,6 +20,8 @@
 
 LOCAL_DEX_PREOPT := false
 
+LOCAL_COMPATIBILITY_SUITE := device-tests
+
 include $(BUILD_PACKAGE)
 
 # Use the folloing include to make our test apk.