Refactor RBE support for Javac/R8/D8 to use the remoteexec package.

Test: build with and without RBE_JAVAC/RBE_R8/RBE_D8 set.
Change-Id: I1607f8cfb4d2c3cbb3672152bbeb561d9968bc60
diff --git a/Android.bp b/Android.bp
index 7cdd928..a9eceb2 100644
--- a/Android.bp
+++ b/Android.bp
@@ -349,6 +349,7 @@
     deps: [
         "blueprint-proptools",
         "soong-android",
+        "soong-remoteexec",
     ],
     srcs: [
         "java/config/config.go",