Move bazel.Properties to a BazelModuleBase

This allows more direct access to the bazel label and whether the module
is bp2build available.

Test: go test *
Change-Id: I23375835d20fa53d7d94127b2dc2d5bb20487bfb
diff --git a/android/Android.bp b/android/Android.bp
index 00139d8..a8fa53a 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -22,6 +22,7 @@
         "api_levels.go",
         "arch.go",
         "arch_list.go",
+        "bazel.go",
         "bazel_handler.go",
         "config.go",
         "csuite_config.go",