Adding an aconfig flag to guard MSDL in Launcher.

The flag will guard the adoption of the MSDL library in launcher.

Change-Id: I0eb29b67317cdc96d0e5e5ff9af0427ed7e86509
Test: presubmit
Flag: NONE new flag being added
Bug: 377496684
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index 949acc1..5101851 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -506,3 +506,10 @@
     description: "Enable launcher app contrast tiles."
     bug: "341217082"
 }
+
+flag {
+  name: "msdl_feedback"
+  namespace: "launcher"
+  description: "Enable MSDL feedback for Launcher interactions"
+  bug: "377496684"
+}
\ No newline at end of file