Add test suite handling to central androidmk code

MTS is introducing partial MTS test suites that are per-module, with
names of the format: mts-${MODULE}. By centralizing the code for test
suites, we can automatically add "mts" test suite when an
"mts-${MODULE}" test suite is specified, reducing duplication.

Test: m mts
Bug: 170318013
Change-Id: I8ce9d3c252fcc0a937bb5f2826d21cb6c6932d82
diff --git a/python/androidmk.go b/python/androidmk.go
index e60c538..60637d3 100644
--- a/python/androidmk.go
+++ b/python/androidmk.go
@@ -49,7 +49,7 @@
 	entries.Class = "EXECUTABLES"
 
 	entries.ExtraEntries = append(entries.ExtraEntries, func(entries *android.AndroidMkEntries) {
-		entries.AddStrings("LOCAL_COMPATIBILITY_SUITE", p.binaryProperties.Test_suites...)
+		entries.AddCompatibilityTestSuites(p.binaryProperties.Test_suites...)
 	})
 	base.subAndroidMk(entries, p.pythonInstaller)
 }
@@ -58,7 +58,7 @@
 	entries.Class = "NATIVE_TESTS"
 
 	entries.ExtraEntries = append(entries.ExtraEntries, func(entries *android.AndroidMkEntries) {
-		entries.AddStrings("LOCAL_COMPATIBILITY_SUITE", p.binaryDecorator.binaryProperties.Test_suites...)
+		entries.AddCompatibilityTestSuites(p.binaryDecorator.binaryProperties.Test_suites...)
 		if p.testConfig != nil {
 			entries.SetString("LOCAL_FULL_TEST_CONFIG", p.testConfig.String())
 		}