Remove some new memory leaks from SensorManager

After catching an error in Sensor::unflatten, there are memory leaks
caught by the fuzzer in the same test case.

Test: libsensorserviceaidl_fuzzer with testcase from bug
Bug: 269014004
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:c95fa0f0e7c7b73746ff850b85a79fc5f92b784e)
Merged-In: I509cceb41f56ca117d9475f6f6674244560fe582
Change-Id: I509cceb41f56ca117d9475f6f6674244560fe582