property_context: add Codec2 HAL selection property

Bug: 251850069
Test: run the example service and verify the selection works
Change-Id: I8b56e1f716a9dc06019232cd2c5061ccaa1951d0
diff --git a/private/property_contexts b/private/property_contexts
index 415c535..0028830 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -512,6 +512,7 @@
 keyguard.no_require_sim u:object_r:keyguard_config_prop:s0 exact bool
 
 media.c2.dmabuf.padding                      u:object_r:codec2_config_prop:s0 exact int
+media.c2.hal.selection                       u:object_r:codec2_config_prop:s0 exact enum aidl hidl
 
 media.recorder.show_manufacturer_and_model   u:object_r:media_config_prop:s0 exact bool
 media.resolution.limit.32bit                 u:object_r:media_config_prop:s0 exact int