Revert perf test target time to previous one.

ManualBenchmarkState has different default values for test target time
and warmup time.
Perf test numbers may change depending on target time and warmup time.
This CL reverts them to previous ones so that we can get consistent
numbers.

Bug: 174672300
Test: atest CorePerfTests:android.graphics.perftests.TypefaceSerializationPerfTest
Change-Id: I836ed9ba37b1fb424da152d3b53814b7b5115060
1 file changed