Enable `base::StackSamplingProfiler` on ARM64 on Android.

In and of itself, this changes does not do much, because
the users of this class on Android -- Tracing
(`TracingSamplerProfiler`) and Stack Sampled Metrics
(`ThreadProfiler`) -- do not enable stack sampling on
ARM64 on Android yet.

Bug: 1392158
Change-Id: I2fdcfdd8dcbe08211b72bdf0c4567eea2f5b1dbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4043661


Reviewed-by: Eric Seckler <eseckler@chromium.org>
Commit-Queue: Tushar Agarwal <agarwaltushar@google.com>
Cr-Commit-Position: refs/heads/main@{#1075376}