Extractors: Enable building static libraries for all extractors

Current make files builds only shared libraries for extractors
Enable building static libraries for MediaTesting

Test: builds

Bug: 144965408

Change-Id: I4f05cfed60ac19b21aaeab396895b7b94eedee12
diff --git a/media/extractors/wav/Android.bp b/media/extractors/wav/Android.bp
index 7e89271..51e3c31 100644
--- a/media/extractors/wav/Android.bp
+++ b/media/extractors/wav/Android.bp
@@ -1,4 +1,4 @@
-cc_library_shared {
+cc_library {
 
     srcs: ["WAVExtractor.cpp"],