Rename FS_MGR_FS_STAT into FS_MGR_FS_STAT_DATA_PARTITION

- FS_STAT can be returned per each partition mounted. Currently only
  /data partition is checked but rename it so that we can add additional
  partitions in future.

Bug: 132691841
Test: Build
Change-Id: I3f1280ce84df1137a92ac59b15937a32c7ac8d01
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index bb01911..8d5b5b4 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -4118,10 +4118,10 @@
         // as UMOUNT_STAT_* from init/reboot.cpp.
         // Logged from f/b/services/.../BootReceiver.java.
         SHUTDOWN_UMOUNT_STAT = 2;
-        // Reprepsents fie system mounting error code for the current boot. Error codes defined
-        // as combination of FsStatFlags from system/core/fs_mgr/fs_mgr.cpp.
+        // Reprepsents fie system mounting error code of /data partition for the current boot.
+        // Error codes defined as combination of FsStatFlags from system/core/fs_mgr/fs_mgr.cpp.
         // Logged from f/b/services/.../BootReceiver.java.
-        FS_MGR_FS_STAT = 3;
+        FS_MGR_FS_STAT_DATA_PARTITION = 3;
     }
 
     // Type of the event.