Make libaudiofoundation can be a static library.

As libaudiofoundation is not part of VNDK, it may break VTS build. Make
libaudiofoundation be a static library can help solve the problem.

Test: make, atest VtsHalAudioV5_0Target
Bug: 142683018
Bug: 150299743
Change-Id: I814c5380dfa5269fccc7bd37e29f308f1bc9bf28
(cherry picked from commit 54b0d31e6a46edb1f422822119bcaf7fda764186)
Merged-In: I814c5380dfa5269fccc7bd37e29f308f1bc9bf28
diff --git a/media/libaudiofoundation/Android.bp b/media/libaudiofoundation/Android.bp
index 8dcc421..93bc4d9 100644
--- a/media/libaudiofoundation/Android.bp
+++ b/media/libaudiofoundation/Android.bp
@@ -12,7 +12,7 @@
     ],
 }
 
-cc_library_shared {
+cc_library {
     name: "libaudiofoundation",
     vendor_available: true,
     double_loadable: true,