Enable External Compress Format flag

This is needed so that external media files are compressed
explicitely by tinycompress.

Issue: FP3-A12#6
Issue: FP4-INT#34
Change-Id: I65f3a24917723080acc14735a60ea1e5fd12869c
diff --git a/Android.bp b/Android.bp
index a4f8d6d..417e5ac 100644
--- a/Android.bp
+++ b/Android.bp
@@ -28,6 +28,7 @@
         "-Werror",
         "-Wno-macro-redefined",
         "-Wno-unused-function",
+        "-DENABLE_EXTENDED_COMPRESS_FORMAT"
     ],
     export_include_dirs: ["include"],
     srcs: [