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
Merged-In: I509cceb41f56ca117d9475f6f6674244560fe582
Change-Id: I509cceb41f56ca117d9475f6f6674244560fe582
(cherry picked from commit c95fa0f0)
Merged-In: I509cceb41f56ca117d9475f6f6674244560fe582
(cherry picked from commit on googleplex-android-review.googlesource.com host: e54698d0)
Merged-In: I509cceb41f56ca117d9475f6f6674244560fe582