Initial libmediaformatshaper

mediaformatshaper library to amend MediaFormat parameters before
encoding. This is the initial cut of the library.
Disabled by default, enable with "setprop debug.stagefright.enableshaping 1"

Bug: 182827840
Test: build, boot, encode video
Change-Id: I8cefb6ed6ad286ae2192796bf15760e873e0d2f3
diff --git a/media/libmedia/Android.bp b/media/libmedia/Android.bp
index 9e33610..b2056ad 100644
--- a/media/libmedia/Android.bp
+++ b/media/libmedia/Android.bp
@@ -432,5 +432,8 @@
         },
     },
 
-    apex_available: ["com.android.media"],
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.media"
+    ],
 }