init: set a new trigger when a vold checkpoint is committed

Add post-fs-data-checkpointed trigger when vold completes checkpointing
after an OTA update.

Bug: 350362101
Test: ABTD
Change-Id: I647a73a942174015b46c5f40bd8f8d3347977ecd
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 2443b7c..b804c1b 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -1087,6 +1087,9 @@
     # Update dm-verity state and set partition.*.verified properties.
     verity_update_state
 
+on property:vold.checkpoint_committed=1
+    trigger post-fs-data-checkpointed
+
 # It is recommended to put unnecessary data/ initialization from post-fs-data
 # to start-zygote in device's init.rc to unblock zygote start.
 on zygote-start