Decalre a soong module for hostapd manifest

Bug: 202992812
Bug: 259516259
Test: build
Change-Id: Ibc2b7a0d66f6c07660dee96a6a3f7976687ce18e
diff --git a/hostapd/Android.bp b/hostapd/Android.bp
index d7cc39b..04ef669 100644
--- a/hostapd/Android.bp
+++ b/hostapd/Android.bp
@@ -319,3 +319,9 @@
     ],
 
 }
+
+// This manifest can used by a vendor apex module for hostapd as well.
+filegroup {
+    name: "android.hardware.wifi.hostapd.xml",
+    srcs: ["android.hardware.wifi.hostapd.xml"],
+}