Suppress implicit-fallthrough warnings in mediarecorder.

Add FALLTHROUGH_INTENDED for clang compiler.

Bug: 112564944
Test: build with global -Wimplicit-fallthrough.
Change-Id: I42918227a55029f46362d448c496012de9ad3670
diff --git a/media/libmedia/Android.bp b/media/libmedia/Android.bp
index 1b3a1be..8921b22 100644
--- a/media/libmedia/Android.bp
+++ b/media/libmedia/Android.bp
@@ -3,6 +3,7 @@
     vendor_available: true,
     export_include_dirs: ["include"],
     header_libs:[
+        "libbase_headers",
         "libgui_headers",
         "libstagefright_headers",
         "media_plugin_headers",