Add libcutils as dependency.

Upstream added cras_sh.c as to srcs, which uses ashmem on Android.
That's defined in libcutils.

Bug: None
Test: Builds.
Change-Id: I87ff33305659bdc8ee229c540e14c93bb54b8160
diff --git a/cras/src/Android.bp b/cras/src/Android.bp
index 991e246..070e6ca 100644
--- a/cras/src/Android.bp
+++ b/cras/src/Android.bp
@@ -12,7 +12,10 @@
         "libcras/cras_helpers.c",
     ],
 
-    shared_libs: ["libtinyalsa"],
+    shared_libs: [
+        "libcutils",
+        "libtinyalsa",
+    ],
 
     export_include_dirs: [
         "common",