libz has to be a shared library as the apex complains that it cannot be
statically linked.

Bug: 206121418
Test: Compile
Change-Id: I32dfc24978ea64c20db60d841aea9e0ccaacedb0
diff --git a/Android.bp b/Android.bp
index bd547c9..5f16056 100644
--- a/Android.bp
+++ b/Android.bp
@@ -52,6 +52,9 @@
         "//apex_available:platform",
         "com.android.bluetooth",
     ],
+    shared_libs: [
+        "libz",
+    ],
     stl: "libc++",
     min_sdk_version: "30"
 }
@@ -963,7 +966,6 @@
     ],
     whole_static_libs: [
         "libgrpc_trace",
-        "libz",
     ],
     shared_libs: [
         "liblog",