Add support for including py_binary and *_go_binary in apexs

These additional binary types are useful for some apexs. Add the
ability to include them. Due to the nature of the resulting artifacts
only py binaries with embedded launchers and host go binaries are
supported.

Test: m com.android.support.apexer
Bug: 119332365
Bug: 119332362
Change-Id: I27c253d3647cf7bbe15896610d7a74a5f93e8bec
diff --git a/Android.bp b/Android.bp
index e9597f4..4d73049 100644
--- a/Android.bp
+++ b/Android.bp
@@ -375,6 +375,7 @@
         "soong-android",
         "soong-cc",
         "soong-java",
+        "soong-python",
     ],
     srcs: [
         "apex/apex.go",