Add libz to static libs of libfdtrack

libz is no longer statically linked into libunwindstatck, so needs to be
added explicitly to this rdep

Bug: 281077552
Test: presubmits
Change-Id: Iadcee0c8b98ce4cfd3e238e7e4b3a3becc315e6c
diff --git a/libfdtrack/Android.bp b/libfdtrack/Android.bp
index c19d8b2..644d46d 100644
--- a/libfdtrack/Android.bp
+++ b/libfdtrack/Android.bp
@@ -27,6 +27,7 @@
         "libunwindstack",
         "liblzma",
         "liblog",
+        "libz",
     ],
     target: {
         recovery: {