[SM01] Add rat type fields in data usage atoms for mobile data

Test: build
Bug: 129082217
Change-Id: Idfc048d49f98acb805f49046a0b3dc871e001142
Merged-In: Idfc048d49f98acb805f49046a0b3dc871e001142
(cherry picked from commit 071a06635b)

cmds/statsd/src/atoms.proto

@@ -4589,6 +4589,8 @@ message MobileBytesTransfer {
     optional int64 tx_bytes = 4;
 
     optional int64 tx_packets = 5;
+
+    optional int32 rat_type = 6;
 }
 
 /**
@@ -4611,6 +4613,8 @@ message MobileBytesTransferByFgBg {
     optional int64 tx_bytes = 5;
 
     optional int64 tx_packets = 6;
+
+    optional int32 rat_type = 7;
 }
 
 /**