libaudiopolicy: Add static variant of library

Bug: 215318251
Test: build
Change-Id: I8924dc1271a4e9745d4ae729d89ee4dc66778356
diff --git a/media/libaudioclient/Android.bp b/media/libaudioclient/Android.bp
index b0f155a..8cc67c4 100644
--- a/media/libaudioclient/Android.bp
+++ b/media/libaudioclient/Android.bp
@@ -39,7 +39,7 @@
     },
 }
 
-cc_library_shared {
+cc_library {
     name: "libaudiopolicy",
     srcs: [
         "AudioAttributes.cpp",