Revert "Remove libmdnssd"

This reverts commit 1cbd8211e75731069c0a7c8f8874d9d4b7429e30.

Reason for revert: Droidmonitor triggered revert due to breakage in b/341118115

Change-Id: I0fed4225bd1d4d8888334fdc2a9fac353b748edd
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 42cfc9a..22284b1 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -172,6 +172,7 @@
     libjpeg \
     liblog \
     libm.bootstrap \
+    libmdnssd \
     libmedia \
     libmedia_jni \
     libmediandk \