Add android_sdk_repository_extension and define @androidsdk MODULE.bazel

Child project will not use android_sdk_repository_extension before //external* are removed from @bazel_tools.

PiperOrigin-RevId: 613783798
Change-Id: I0ca2f4f0ad2696fd49905b6ec33f8e99871424e6

BUILD

diff --git a/BUILD b/BUILD
index c0770f0..9c93e71 100644
--- a/BUILD
+++ b/BUILD
@@ -53,3 +53,31 @@
             "@platforms//os:android",
         ],
 )
+
+# TODO: remove these alias when we no longer needs bind in WORKSPACE.bzlmod
+# Because @androidsdk is not defined in WORKSPACE.bzlmod, where the only valid place
+# we can call native function bind. Using these alias to forward the binding.
+alias(
+    name = "androidsdk_sdk",
+    actual = "@androidsdk//:sdk",
+)
+
+alias(
+    name = "androidsdk_d8_jar_import",
+    actual = "@androidsdk//:d8_jar_import",
+)
+
+alias(
+    name = "androidsdk_dx_jar_import",
+    actual = "@androidsdk//:dx_jar_import",
+)
+
+alias(
+    name = "androidsdk_files",
+    actual = "@androidsdk//:files",
+)
+
+alias(
+    name = "androidsdk_has_android_sdk",
+    actual = "@androidsdk//:has_android_sdk",
+)