Add an extra . before the file extensions recorded in metrics

plugins/core/jetbrains-community/src/software/aws/toolkits/jetbrains/services/telemetry/OpenedFileTypesMetrics.kt

@@ -52,7 +52,8 @@ class OpenedFileTypesMetricsService : Disposable {
     @Synchronized
     fun addToExistingTelemetryBatch(fileExt: String) {
         if (fileExt in ALLOWED_CODE_EXTENSIONS) {
-            currentOpenedFileTypes.add(fileExt)
+            val extension = ".$fileExt"
+            currentOpenedFileTypes.add(extension)
         }
     }
 

plugins/core/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/telemetry/OpenedFileTypeMetricsTest.kt

@@ -25,7 +25,7 @@ class OpenedFileTypeMetricsTest {
     @Test
     fun `test addToExistingTelemetryBatch with allowed extension`() {
         service.addToExistingTelemetryBatch("kt")
-        assert(service.getOpenedFileTypes().contains("kt"))
+        assert(service.getOpenedFileTypes().contains(".kt"))
     }
 
     @Test