Zero uninitialized field in conversion and fix vts bug

Zero uninitialized sensor event field to zero to avoid undefined
value being passed to framework.

Correct sensor report type check bug in vts.

Bug: 37793558
Bug: 37710268
Test: sensor vts passes
Change-Id: I5042975fea8fe28ae130367ba083a4e4f4e5657e
2 files changed