String.Equals Optimization Benchmark

Created benchmark to measure the performance of the method String.equals
for varying lengths of strings and for implementation-specific corner cases, such
as non-word aligned strings. More such corner cases will be added as I explore
different solutions to optimize this method.

Bug: 21481923
Change-Id: I4a1f244809e03a1c970312a04a8658a745ae27c1
1 file changed