Bug 1696785 - Use (400x400) display size in SelectionActionDelegateTest to avoid unexpected multiple updateposition events during the test. r=geckoview-reviewers,agi

SelectionActionDelegateTest does just respond a single event in each test cases,
so if there are multiple events we need to respond, the test stops working since
the response will be discarded in SelectionActionDelegateChild.jsm [1].

We use a lager display size here to avoid the situation, in bug 1735655 the situation
will be eliminated.

[1] https://searchfox.org/mozilla-central/rev/0998b61022a1ece43afe3c750077e5804c6c6392/mobile/android/actors/SelectionActionDelegateChild.jsm#260-264

Differential Revision: https://phabricator.services.mozilla.com/D128418

mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/SelectionActionDelegateTest.kt

@@ -30,7 +30,7 @@ import org.mozilla.geckoview.GeckoSession
 
 @MediumTest
 @RunWith(Parameterized::class)
-@WithDisplay(width = 100, height = 100)
+@WithDisplay(width = 400, height = 400)
 class SelectionActionDelegateTest : BaseSessionTest() {
     enum class ContentType {
         DIV, EDITABLE_ELEMENT, IFRAME