Revert "[fuchsia] Enable AccessibilityBridgeTest.PerformScrollToMakeVisible"

This reverts commit 92eb6fc1.

Reason for revert: Consistent failure on Fuchsia ARM64

See https://ci.chromium.org/p/chromium/builders/ci/Fuchsia%20ARM64/110721

Original change's description:
> [fuchsia] Enable AccessibilityBridgeTest.PerformScrollToMakeVisible
>
> This test was disabled due to a change in the accessibility internals.
> The change necessary to get this test to work was included in CL
> https://crrev.com/c/2314758.
>
> Bug: 1122806
> Change-Id: I71045e0e432d07b259fc56ed31abedc2316a0b2d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2544746
> Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
> Commit-Queue: Sharon Yang <yangsharon@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#828509}

TBR=sergeyu@chromium.org,yangsharon@chromium.org

Change-Id: Ica0aef476af02c55b48dca2b2a2974bfa58bbf08
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1122806
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2545850Reviewed-by: Jiewei Qian  <qjw@chromium.org>
Commit-Queue: Jiewei Qian  <qjw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828554}

fuchsia/engine/browser/accessibility_bridge_browsertest.cc

@@ -325,7 +325,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityBridgeTest, Disconnect) {
 
 // TODO(crbug.com/1122806): Migrate this test to use kSignalEndOfTest and
 // re-enable it.
-IN_PROC_BROWSER_TEST_F(AccessibilityBridgeTest, PerformScrollToMakeVisible) {
+IN_PROC_BROWSER_TEST_F(AccessibilityBridgeTest,
+                       DISABLED_PerformScrollToMakeVisible) {
   constexpr int kScreenWidth = 720;
   constexpr int kScreenHeight = 640;
   gfx::Rect screen_bounds(kScreenWidth, kScreenHeight);