Vulkan: Reserve reasonable amount storage for GarbageObjects Based on data collected from app traces, set the initial storage enough to accommodate most of the usage cases. For ContextVk::mCurrentGarbage, the problem is that after the collectGarbage call, it lose the capacity value, so next time it end up with 0 and slowly grow the capacity again. This CL always keeps the capacity after the collectGarbage call. Bug: b/293297177 Change-Id: I70deccd879311aebe6ea3bbf4ecf5c54a74ef584 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6244922 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Charlie Lao <cclao@google.com>