Moved implementation of ConvertUtils to cpp file.

Test: make android.hardware.sensors@aidl-multihal
Bug: 206867060
Change-Id: I73e8d061bdfe39f956acda1cf9b138da2dcc1f22
diff --git a/sensors/aidl/default/multihal/Android.bp b/sensors/aidl/default/multihal/Android.bp
index a7f6af2..eee1062 100644
--- a/sensors/aidl/default/multihal/Android.bp
+++ b/sensors/aidl/default/multihal/Android.bp
@@ -43,6 +43,7 @@
     export_include_dirs: ["include"],
     srcs: [
         "HalProxyAidl.cpp",
+        "ConvertUtils.cpp",
     ],
     visibility: [
         ":__subpackages__",