Exclude external maven dependencies source from apk source jar.

A new version of bazel apparently started including source jars from maven dependencies into the transitive_source_jars depset.
Add temporary logic to filter out those source jars for now, to fix errors with duplicate kotlin stdlib source being added.

PiperOrigin-RevId: 534494589

Author: brettchabot

build_extensions/maven/axt_maven_apk.bzl

@@ -5,9 +5,12 @@ load("//build_extensions/maven:maven_info.bzl", "MavenFilesInfo", "MavenInfo")
 
 def _axt_maven_apk_impl(ctx):
     # produce src jar
+    # hack - exclude source jars from external maven artifacts
+    # TODO(b/283992063): use an aspect to gather this info
+    axt_jars = [jar for jar in ctx.attr.included_dep[JavaInfo].transitive_source_jars.to_list() if "maven.org" not in jar.path]
     combine_jars(
         ctx = ctx,
-        input_jars_deps = ctx.attr.included_dep[JavaInfo].transitive_source_jars,
+        input_jars_deps = axt_jars,
         output = ctx.outputs.src_jar,
     )