Fix KeyboardLayoutTest when new_settings flag is on

getKeyboardLayoutsForInputDevice() method doesn't work in new
settings scenario, hence breaking the KeyboardLayoutTest. Modify
the CTS test to work with or without the new setting API.

Test: atest KeyboardLayoutTest
Bug: 270125316
Change-Id: I8b56153f804a4486b1f1528c12ce75fd2b98290b

services/core/java/com/android/server/input/KeyboardLayoutManager.java

@@ -283,7 +283,8 @@ final class KeyboardLayoutManager implements InputManager.InputDeviceListener {
     public KeyboardLayout[] getKeyboardLayoutsForInputDevice(
             final InputDeviceIdentifier identifier) {
         if (useNewSettingsUi()) {
-            return new KeyboardLayout[0];
+            // Provide all supported keyboard layouts since Ime info is not provided
+            return getKeyboardLayouts();
         }
         final String[] enabledLayoutDescriptors =
                 getEnabledKeyboardLayoutsForInputDevice(identifier);

services/tests/servicestests/src/com/android/server/input/KeyboardLayoutManagerTests.kt

@@ -256,12 +256,16 @@ class KeyboardLayoutManagerTests {
     @Test
     fun testNewUi_getKeyboardLayoutsForInputDevice() {
         NewSettingsApiFlag(true).use {
-            val keyboardLayouts =
-                keyboardLayoutManager.getKeyboardLayoutsForInputDevice(keyboardDevice.identifier)
-            assertEquals(
-                "New UI: getKeyboardLayoutsForInputDevice API should always return empty array",
-                0,
-                keyboardLayouts.size
+            val keyboardLayouts = keyboardLayoutManager.keyboardLayouts
+            assertNotEquals(
+                    "New UI: getKeyboardLayoutsForInputDevice API should not return empty array",
+                    0,
+                    keyboardLayouts.size
+            )
+            assertTrue(
+                    "New UI: getKeyboardLayoutsForInputDevice API should provide English(US) " +
+                            "layout",
+                    hasLayout(keyboardLayouts, ENGLISH_US_LAYOUT_DESCRIPTOR)
             )
         }
     }