Dump mPreventImeStartupUnlessTextEditor value

config_preventImeStartupUnlessTextEditor is an Android configuration
option that, when enabled, prevents the InputMethodManagerService from
starting up the input method (keyboard) unless a text editor is focused.

This configuration is used in many CtsInputMethodTestCases tests (like
CtsInputMethodTestCases:KeyboardVisibilityControlTest). Understanding
its value is essential for effective test debugging.

Bug: 413464626
Flag: EXEMPT Improving dump debug method
Test: m
Test: adb shell dumpsys input_method | grep mPreventImeStartupUnlessTextEditor
Change-Id: I9d443e438b0522538da5a281f58a639f46a0343f