Add a comment to allocate field number above 100000 for OEMs to use and block
them off from being used.

Bug: 72866543
Test: statsd_test, cts tests
Change-Id: I2074f53eb3360aa93a9bea4e596a8c295696312f
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index 7159b9b..2f617c2 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -130,6 +130,9 @@
         FullBatteryCapacity full_battery_capacity = 10020;
         Temperature temperature = 10021;
     }
+
+    // DO NOT USE field numbers above 100,000 in AOSP. Field numbers above
+    // 100,000 are reserved for non-AOSP (e.g. OEMs) to use.
 }
 
 /**
@@ -1529,4 +1532,4 @@
 
     // Temperature in degrees C.
     optional float temperature_C = 3;
-}
\ No newline at end of file
+}