Default to timing out to dock user in 1 minute

Previous default was to disable the feature.

Bug: 260123067
Test: verified locally on device that the default is 1 minute for a new
user

Change-Id: I8f577d62b729eb1c1a0579a7b4eb6b50f7f7f0d8

tests/robotests/src/com/android/settings/users/TimeoutToDockUserPreferenceControllerTest.java

@@ -124,7 +124,8 @@ public class TimeoutToDockUserPreferenceControllerTest {
         Settings.Secure.putStringForUser(mContext.getContentResolver(), TIMEOUT_TO_DOCK_USER,
                 null, UserHandle.myUserId());
 
-        assertThat(mController.getSummary().toString()).isEqualTo(mEntries[0]);
+        assertThat(mController.getSummary().toString()).isEqualTo(
+                mEntries[TimeoutToDockUserSettings.DEFAULT_TIMEOUT_SETTING_VALUE_INDEX]);
     }
 
     @Test