rename otbr-agent to ot-daemon

Rename to better align with our long-term vision on Android

Bug: 288202515
Change-Id: I1b7e39950d39ec781e46c6c0e1b38ad837b9ce4e
diff --git a/apex/com.android.threadnetwork-file_contexts b/apex/com.android.threadnetwork-file_contexts
index 45d9bff..412c555 100644
--- a/apex/com.android.threadnetwork-file_contexts
+++ b/apex/com.android.threadnetwork-file_contexts
@@ -1,3 +1,3 @@
 (/.*)?                         u:object_r:system_file:s0
-/bin/otbr-agent                u:object_r:ot_daemon_exec:s0
+/bin/ot-daemon                 u:object_r:ot_daemon_exec:s0
 /bin/ot-ctl                    u:object_r:ot_ctl_exec:s0