seandroid: resolving compilation issue for non-debug build

qmi_ping is a internal test app to QMI.  Thermal engine
should NOT be using it. Hence revoking the permission.
Also this was causing compilation issue because qmi_ping
type declearation was guarded under userdebug flag, but
getting used outside.

Change-Id: Iafd900657aaee7d1996694223ba0a8eadc1f285e