Make the SoundRecorder a required module.

This rule adds a dependency on the SoundRecorder app in the Browser
so that it will get built and added to the system image. We need the
sound recorder to fully support audio capture as part of the
Media Capture API.

Bug: 3498644
Change-Id: I166fc90553358970b16b23e2a7e4e8efa202127f
diff --git a/Android.mk b/Android.mk
index a5a47b3..b85a869 100644
--- a/Android.mk
+++ b/Android.mk
@@ -17,6 +17,9 @@
 
 LOCAL_EMMA_COVERAGE_FILTER := *,-com.android.common.*
 
+# We need the sound recorder for the Media Capture API.
+LOCAL_REQUIRED_MODULES := SoundRecorder
+
 include $(BUILD_PACKAGE)
 
 # additionally, build tests in sub-folders in a separate .apk