Make system property audio.camerasound.force a vendor-writable property,

This property is read by the audio service in system server to toggle
camera shutter sound enforcement on a device-specific basis.

Test: Camera shutter sound enforcement works when audio.camerasound.force is set
Bug: 110126976
Change-Id: I2720d3c699c4712d1a328f59dde0b16bbf1016f3
diff --git a/private/compat/27.0/27.0.ignore.cil b/private/compat/27.0/27.0.ignore.cil
index 3b3f6f8..9b82f35 100644
--- a/private/compat/27.0/27.0.ignore.cil
+++ b/private/compat/27.0/27.0.ignore.cil
@@ -29,6 +29,7 @@
     exported3_default_prop
     exported3_radio_prop
     exported3_system_prop
+    exported_audio_prop
     exported_bluetooth_prop
     exported_config_prop
     exported_dalvik_prop