AudioEffects: Build static libaudiopreprocessing

Test: build AudioPreProcessingTest and test on device
Test: atest preprocessing_benchmark
Bug: 181670517
Change-Id: I5e051c510ab3f0bcb83dfbe7cdff0e16133c8747
diff --git a/media/libeffects/preprocessing/Android.bp b/media/libeffects/preprocessing/Android.bp
index e46a136..eb3ce34 100644
--- a/media/libeffects/preprocessing/Android.bp
+++ b/media/libeffects/preprocessing/Android.bp
@@ -18,7 +18,7 @@
     ],
 }
 
-cc_library_shared {
+cc_library {
     name: "libaudiopreprocessing",
     vendor: true,
     relative_install_path: "soundfx",