AIDL effect: Add default Effect factory implementation to platform sepolicy

Add example implementation services: IFactory under android.hardware.audio.effect.
An audio HAL AIDL example service will register with the default implementations.

Bug: 238913361
Test: m, and flash with Pixel 6a.

Change-Id: Ib331899fd47b6b334b120e20617174d01e71ddb8
diff --git a/vendor/file_contexts b/vendor/file_contexts
index 3646d4b..8fd8525 100644
--- a/vendor/file_contexts
+++ b/vendor/file_contexts
@@ -4,7 +4,8 @@
 /(vendor|system/vendor)/bin/hw/android\.hardware\.atrace@1\.0-service         u:object_r:hal_atrace_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.audio(@2\.0-|\.)service     u:object_r:hal_audio_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.audio@7\.0-service\.example     u:object_r:hal_audio_default_exec:s0
-/(vendor|system/vendor)/bin/hw/android\.hardware\.audio\.service-aidl.example     u:object_r:hal_audio_default_exec:s0
+/(vendor|system/vendor)/bin/hw/android\.hardware\.audio\.service-aidl\.example     u:object_r:hal_audio_default_exec:s0
+/(vendor|system/vendor)/bin/hw/android\.hardware\.audio\.effect\.service-aidl\.example      u:object_r:hal_audio_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.automotive\.audiocontrol@1\.0-service    u:object_r:hal_audiocontrol_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.automotive\.audiocontrol@2\.0-service    u:object_r:hal_audiocontrol_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.automotive\.audiocontrol-service.example u:object_r:hal_audiocontrol_default_exec:s0