Statically link DnsSdTxtRecord into framework-wifi

DnsSdTxtRecord is @hide, thus need to statically
link it into framework-wifi.

Bug: 135998869
Test: boots up and connects to wifi
Merged-In: Ic5f7decfdbc3116a15fe8da3841cc7620105996d
Change-Id: Ic5f7decfdbc3116a15fe8da3841cc7620105996d
(clean cherry-pick from internal branch)
diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index 6827403..c3b8668 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -83,6 +83,7 @@
 filegroup {
     name: "net-utils-framework-wifi-common-srcs",
     srcs: [
+        "src_frameworkcommon/android/net/util/nsd/DnsSdTxtRecord.java",
         "src_frameworkcommon/android/net/util/MacAddressUtils.java",
     ],
     visibility: [