Adapt special case framework support.

I'm adding a annotation processor to the framework target that does not
run as part of the main build, but only for a parallel build target
framework-annotation-proc, which is identical to framework except that it
also runs an annotation processor. Update build rules to be aware of this
target so that it builds successfully.

Test: m framework-annotation-proc
Bug: 113853502

Change-Id: I8b20758dc8bd0e8cb2542414d7a45a2cd7d2e158
diff --git a/java/androidmk.go b/java/androidmk.go
index 877d840..bd88a1d 100644
--- a/java/androidmk.go
+++ b/java/androidmk.go
@@ -70,7 +70,7 @@
 				// Temporary hack: export sources used to compile framework.jar to Make
 				// to be used for droiddoc
 				// TODO(ccross): remove this once droiddoc is in soong
-				if library.Name() == "framework" {
+				if (library.Name() == "framework") || (library.Name() == "framework-annotation-proc") {
 					fmt.Fprintln(w, "SOONG_FRAMEWORK_SRCS :=", strings.Join(library.compiledJavaSrcs.Strings(), " "))
 					fmt.Fprintln(w, "SOONG_FRAMEWORK_SRCJARS :=", strings.Join(library.compiledSrcJars.Strings(), " "))
 				}