Replace array for collection

Without transpiling the code to typescript, it is no longer necessary to keep the values as array. instead we can use Collection/List and avoid a lot of conversion

Bug: 311642700
Test: atest FlickerTests WMShellFlickerTests
Change-Id: I43aaf5c793b97bb5b4e8568df99ed4a272e5b07b

libs/WindowManager/Shell/tests/flicker/splitscreen/src/com/android/wm/shell/flicker/splitscreen/UnlockKeyguardToSplitScreen.kt

@@ -113,7 +113,6 @@ class UnlockKeyguardToSplitScreen(override val flicker: LegacyFlickerTest) :
                             subject.name.contains(primaryApp.toLayerName()) && subject.isVisible
                         }
                         .mapNotNull { primaryApp -> primaryApp.layer.visibleRegion }
-                        .toTypedArray()
 
                 val primaryAppRegionArea = RegionSubject(primaryAppRegions, it.timestamp)
                 it.visibleRegion(secondaryApp).notOverlaps(primaryAppRegionArea.region)

tests/FlickerTests/IME/src/com/android/server/wm/flicker/ime/CloseImeOnDismissPopupDialogTest.kt

@@ -85,7 +85,6 @@ class CloseImeOnDismissPopupDialogTest(flicker: LegacyFlickerTest) : BaseTest(fl
                     val visibleAreas =
                         imeSnapshotLayers
                             .mapNotNull { imeSnapshotLayer -> imeSnapshotLayer.layer.visibleRegion }
-                            .toTypedArray()
                     val imeVisibleRegion = RegionSubject(visibleAreas, timestamp)
                     val appVisibleRegion = it.visibleRegion(imeTestApp)
                     if (imeVisibleRegion.region.isNotEmpty) {

tests/FlickerTests/src/com/android/server/wm/flicker/CommonAssertions.kt

@@ -281,7 +281,6 @@ fun LegacyFlickerTest.snapshotStartingWindowLayerCoversExactlyOnApp(
             val visibleAreas =
                 snapshotLayers
                     .mapNotNull { snapshotLayer -> snapshotLayer.layer.visibleRegion }
-                    .toTypedArray()
             val snapshotRegion = RegionSubject(visibleAreas, it.timestamp)
             val appVisibleRegion = it.visibleRegion(component)
             // Verify the size of snapshotRegion covers appVisibleRegion exactly in animation.