AAPT2: Introduce command to run unit tests

This command will execute the aapt2_tests with a parameter
to emit XML test results into the out/dist directory.

Test: manual
Change-Id: I10cf119bb47b7698ddd91b1adf7323e51d169970
diff --git a/tools/aapt2/Android.mk b/tools/aapt2/Android.mk
new file mode 100644
index 0000000..e0c9d1c
--- /dev/null
+++ b/tools/aapt2/Android.mk
@@ -0,0 +1,7 @@
+include $(CLEAR_VARS)
+
+.PHONY: aapt2_run_host_unit_tests
+aapt2_run_host_unit_tests: PRIVATE_GTEST_OPTIONS := --gtest_output=xml:$(DIST_DIR)/gtest/aapt2_host_unit_tests_result.xml
+aapt2_run_host_unit_tests: $(HOST_OUT_NATIVE_TESTS)/aapt2_tests/aapt2_tests
+	-$(HOST_OUT_NATIVE_TESTS)/aapt2_tests/aapt2_tests $(PRIVATE_GTEST_OPTIONS) > /dev/null 2>&1
+