Bump xamarin-android-tools to b2a7ebc (includes #299 skill update)

rmarinho · Copilot · rmarinho · commit e158bf162e88 · 2026-03-11T20:11:20.000Z
Co-authored-by: Copilot &lt;223556219+Copilot@users.noreply.github.com&gt;
diff --git a/external/xamarin-android-tools b/external/xamarin-android-tools
@@ -1 +1 @@
-Subproject commit f9416d4bacd34ed1191abf161cdb788bf259e038
+Subproject commit b2a7ebc2b9b7b94ab7a8bbb68eeba229b70976e3
