Fix memory leak

Bug: 166073521
Test: atest CtsNNAPIBenchmarkTestCases
Change-Id: Ic63d9f746ea8ae69aaf91d27b14e689409df8cdb
Merged-In: I74c5397b247e62a1159057bb18a24ba06e1be7c0
(cherry picked from commit 91433082cf3a882b4e38f4ae58afbe5216a74850)
1 file changed