Preserve order of a11y events

Test: cts-tradefed run singleCommand cts -d --module CtsAccessibilityServiceTestCases
cts-tradefed run singleCommand cts -d --module CtsAccessibilityTestCases
cts-tradefed run singleCommand cts -d --module CtsUiAutomationTestCases
Change-Id: I6a9230473f79148a3da9808d67d9e0c80abc8384
1 file changed