closeTab calls finish() instead of finishAndRemoveTask()

It doesn't need to be finishAndRemoveTask() and it causes weird behavior
in resize scenario, because finishAndRemoveTask() cleans up Resize
Activity before it's ready to restart MainActivity, so it shows Launcher
for a while which is very weird.

Bug: 405412371
Test: resize
Change-Id: I62c5475b161217c0e88841d538c3a16def502d28
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.kt b/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.kt
index 37147eb..6177d11 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.kt
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.kt
@@ -193,7 +193,7 @@
 
     fun closeTab(tab: TabLayout.Tab) {
         if (terminalTabAdapter.tabs.size == 1) {
-            finishAndRemoveTask()
+            finish()
         }
         viewPager.offscreenPageLimit -= 1
         terminalTabAdapter.deleteTab(tab.position)