tree d215643ac5a112e7555db8c267cc7284cf468924
parent 38569b6f7794b6068b7ea600cf73ee54a2cbb322
author Rui Qiu <ruiqiu@google.com> 1634063132 -0700
committer Rui Qiu <ruiqiu@google.com> 1634244298 -0700

Require listener to be set for CarTelemetryManager APIs

All CarTelemetryManager APIs except for set and clearListener
will first check if the listener is set before propagating the call to
CarTelemetryService.

Bug: 198824696
Test: atest CarServiceTest:CarTelemetryManagerTest

Change-Id: Id508447e074a63fdfade29ecc5c50fb2b28f9693