Fix memory leak in getInstrumentationResult

Merged-In: I2054aa4a77c65580f880accca0ed0c58734069cf
Change-Id: I2054aa4a77c65580f880accca0ed0c58734069cf
Fix: 135677389
Test: build_and_run_benchmark.sh model-loading-stress
Test: total memory does not grow in Android Studio Memory Profiler
(cherry picked from commit 2579dc71b4f9aead7d3b96d2f8a85343f7c36e41)
1 file changed