spatializer_benchmark: Update reference benchmark numbers

Benchmark numbers on Pixel 5 are now updated by ensuring that
spatializer_benchmark runs on high performance cores running at
maximum frequency

Bug: 237483497
Test: Push libspatialaudio.so to /data/local/tmp and then
 adb shell LD_LIBRARY_PATH=/data/local/tmp \
 taskset 80 /data/local/tmp/spatializer_benchmark

Change-Id: I9f89615c6e201ceaf31086788b1234b09d0a3a37