Audio V4: Cast conversion now deduce both types

That avoids to repeat the destination type which
can change between versions.

Bug: 38184704
Test: compile
Change-Id: I55c881afe5f6fc511ea01b19c5d46de12fb1e0d2
Signed-off-by: Kevin Rocard <krocard@google.com>
diff --git a/audio/common/all-versions/default/Android.bp b/audio/common/all-versions/default/Android.bp
index 8f6b74c..4a27bb7 100644
--- a/audio/common/all-versions/default/Android.bp
+++ b/audio/common/all-versions/default/Android.bp
@@ -33,7 +33,11 @@
     ],
 
     header_libs: [
+        "android.hardware.audio.common.util@all-versions",
         "libaudio_system_headers",
         "libhardware_headers",
     ],
+    export_header_lib_headers: [
+        "android.hardware.audio.common.util@all-versions",
+    ]
 }