Add software dependency stack_sampled_metrics

Add a new dependency for stack sampled metrics a.k.a the stack sampling
profiler. The software dependency will match
StackSamplingProfiler::IsSupportedForCurrentPlatform() once
https://chromium-review.googlesource.com/c/chromium/src/+/3809691 is
submitted.

BUG=b:214117401,chromium:1324337
TEST=Ran smoke test from
https://chromium-review.googlesource.com/c/chromiumos/platform/tast-tests/+/3969653,
ensured it ran on volteer device
TEST=../platform/tast/fast_build.sh -T

Change-Id: I4a926fa0c067318ddaed40c40b56fde8e88a7992
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/tast/+/3971304
Commit-Queue: Ian Barkley-Yeung <[email protected]>
Reviewed-by: Seewai Fu <[email protected]>
Tested-by: Ian Barkley-Yeung <[email protected]>
diff --git a/docs/test_dependencies.md b/docs/test_dependencies.md
index 296d673..731df8f 100644
--- a/docs/test_dependencies.md
+++ b/docs/test_dependencies.md
@@ -192,6 +192,8 @@
 *   `siernia` - Sirenia is present on a non-ManaTEE image.
 *   `smartdim` - Use smart dim to defer the imminent screen dimming.
 *   `smartctl` - Ability to run smartctl software utility.
+*   `stack_sampled_metrics` - Ability to run the stack profiler and gather
+stack-sampled metrics.
 *   `storage_wearout_detect` - The ability to measure storage device health.
 *   `tablet_form_factor` - The device's primary form factor is tablet
 *   `tast_vm` - The test is running in a VM [managed by chromite](https://chromium.googlesource.com/chromiumos/chromite/+/HEAD/lib/cros_test.py#396).