Statically include android.test.runner classes in legacy-android-test

In preparation for removing junit and android.test classes from
the Android API this change adds the android.test classes that are in
the android.test.runner library into legacy-android-test so that they
can be statically included into the application.

The junit.... classes from android.test.runner can already be
statically included from the junit library.

Bug: 30188076
Test: make checkbuild
Change-Id: Id8d32da9e46f0d9142b60ef28998b40e8d237b32
diff --git a/legacy-test/Android.mk b/legacy-test/Android.mk
index 05fec5e..0835cad 100644
--- a/legacy-test/Android.mk
+++ b/legacy-test/Android.mk
@@ -19,7 +19,7 @@
 # Build the legacy-test library
 # =============================
 # This contains the junit.framework and android.test classes that were in
-# Android API level 25.
+# Android API level 25 excluding those from android.test.runner.
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
@@ -31,10 +31,13 @@
 
 # Build the legacy-android-test library
 # =============================
-# This contains the android.test classes that were in Android API level 25.
+# This contains the android.test classes that were in Android API level 25,
+# including those from android.test.runner.
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES := $(call all-java-files-under, src/android)
+LOCAL_SRC_FILES := \
+    $(call all-java-files-under, src/android) \
+    $(call all-java-files-under, ../test-runner/src/android)
 LOCAL_MODULE := legacy-android-test
 LOCAL_NO_STANDARD_LIBRARIES := true
 LOCAL_JAVA_LIBRARIES := core-oj core-libart framework junit