Add support for android_test modules

android_test module are APKs that can be run as tests, either
as standalone unit tests or as instrumentation tests for another
APK.

Test: m checkbuild
Change-Id: I16661701637e4048fd99442029c3e195ebf373a4
diff --git a/java/java.go b/java/java.go
index a4cb65b..02fdc00 100644
--- a/java/java.go
+++ b/java/java.go
@@ -212,8 +212,8 @@
 	}
 
 	Optimize struct {
-		// If false, disable all optimization.  Defaults to true for apps, false for
-		// libraries and tests.
+		// If false, disable all optimization.  Defaults to true for android_app and android_test
+		// modules, false for java_library and java_test modules.
 		Enabled *bool
 
 		// If true, optimize for size by removing unused code.  Defaults to true for apps,