hal_implementation_test: use single line comments

A multi-line comment following what it is describing is strange.

Bug: N/A
Test: N/A
Change-Id: I78b43e8c913090cdeaa761d6344825a02d9beff9
diff --git a/tests/hal/hal_implementation_test.cpp b/tests/hal/hal_implementation_test.cpp
index 6fa730d..2733eae 100644
--- a/tests/hal/hal_implementation_test.cpp
+++ b/tests/hal/hal_implementation_test.cpp
@@ -48,7 +48,7 @@
     "android.hardware.confirmationui@1.0",
     "android.hardware.contexthub@1.0",
     "android.hardware.fastboot@1.0",
-    "android.hardware.gnss.measurement_corrections@1.1", /* is sub-interface of gnss */
+    "android.hardware.gnss.measurement_corrections@1.1", // is sub-interface of gnss
     "android.hardware.gnss.visibility_control@1.0",
     "android.hardware.graphics.allocator@3.0",
     "android.hardware.graphics.allocator@4.0",