Added CTS coverage tests to android-icu4j-tests-host

Bug: 22023363

(cherry picked from commit cdf2e9eca9adfbc1a177f1c531abc1eaff44d6c3)

Change-Id: Ic8086b39e2b25aa7a52a060901a4cebffab736eb
diff --git a/android_icu4j/Android.mk b/android_icu4j/Android.mk
index a1641be..c3860f9 100644
--- a/android_icu4j/Android.mk
+++ b/android_icu4j/Android.mk
@@ -81,6 +81,7 @@
 LOCAL_SRC_FILES := \
     $(call all-java-files-under,src/main/tests) \
     $(call all-java-files-under,runner/src/main/java) \
+    $(call all-java-files-under,cts-coverage/src/main/tests) \
     $(call all-java-files-under,runner/src/host/java)
 LOCAL_JAVA_RESOURCE_DIRS := src/main/tests
 LOCAL_STATIC_JAVA_LIBRARIES := \