Revert "Revert "Convert libcore java to Android.bp""

This reverts commit 9762264100d81d3dd653cbca2996b288c52f9546.

Jack is disabled everywhere now.  This reapplies
I20a0f0327172bc51db47c7c56ccc806e20cf1244 with updates for changes
to Soong and to add sources to the core-lambda-stubs jar.

Test: m -j checkbuild
Change-Id: I77c9dc558bc6c0f3833b1b79a0707c498e560628
diff --git a/Android.bp b/Android.bp
index 2230ac7..a94c85d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,3 +1,4 @@
 build = [
+    "JavaLibrary.bp",
     "NativeCode.bp",
 ]