[fuchsia] Update Fuchsia API level to 27

Cq-Include-Trybots: luci.chrome.try:fuchsia-smoke-sherlock
Bug: 416304988
Change-Id: I34c706426faf26fdfa340195753f8d427e436572
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6520867
Commit-Queue: Christopher Whelan <[email protected]>
Reviewed-by: Wez <[email protected]>
Reviewed-by: Zijie He <[email protected]>
Commit-Queue: Zijie He <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1475717}
NOKEYCHECK=True
GitOrigin-RevId: c665f98cec18c3f9462f1df94f137349763929df

Author: chwhelan

config/fuchsia/gn_configs.gni

@@ -53,7 +53,7 @@ declare_args() {
 # files from //third_party/ in //build/.
 # Note, `current_cpu` should always exist in the //build/ tree, so the
 # `target_cpu` fallback has been removed.
-fuchsia_target_api_level = 26
+fuchsia_target_api_level = 27
 fuchsia_arch_root =
     "${fuchsia_sdk}/obj/${target_cpu}-api-${fuchsia_target_api_level}"