Fix implicit-fallthrough warnings locally.

It will be a global error by default.

Test: make checkbuild
Bug: 112564944
Change-Id: Ia3466649cdddcc754de554edd96a674d00630733
diff --git a/sensorhal/hubconnection.cpp b/sensorhal/hubconnection.cpp
index 6bf3512..83392f2 100644
--- a/sensorhal/hubconnection.cpp
+++ b/sensorhal/hubconnection.cpp
@@ -815,6 +815,7 @@
                 && isSampleIntervalSatisfied(COMMS_SENSOR_MAG_UNCALIBRATED, timestamp)) {
             ++cnt;
         }
+        break;
     default:
         break;
     }
@@ -2308,15 +2309,14 @@
 
     switch (rateLevel) {
         case SENSOR_DIRECT_RATE_VERY_FAST:
-            // No sensor support VERY_FAST, fall through
+            [[fallthrough]]; // No sensor support VERY_FAST, fall through
         case SENSOR_DIRECT_RATE_FAST:
             if (handle != COMMS_SENSOR_MAG && handle != COMMS_SENSOR_MAG_UNCALIBRATED) {
                 return 2500*1000; // 400Hz
             }
-            // fall through
+            [[fallthrough]];
         case SENSOR_DIRECT_RATE_NORMAL:
             return 20*1000*1000; // 50 Hz
-            // fall through
         default:
             return INT64_MAX;
     }