WmTests: adapt home action tests to current settings

[CeRRiLLo89]

Summary

• Adapt the WmTests HOME long-press and double-tap tests to the current DeviceKeysConstants.Action mechanism.
• Configure HOME actions through the corresponding LineageSettings.System settings instead of writing removed PhoneWindowManager behavior fields directly.
• Update the notification-panel case to validate the current panel-toggle path.

Root cause

KeyGestureEventTests still configures HOME behavior through test helpers that write:

• mLongPressOnHomeBehavior
• mDoubleTapOnHomeBehavior

Those fields are no longer part of the current PhoneWindowManager implementation.

The production code now reads HOME actions from:

• LineageSettings.System.KEY_HOME_LONG_PRESS_ACTION
• LineageSettings.System.KEY_HOME_DOUBLE_TAP_ACTION

using DeviceKeysConstants.Action.

The tests therefore no longer compile against the current implementation.

Validation

Current base:

71eec03efd654a4d14995b198566df9225015bb1

m -j6 WmTests completed successfully with this patch.

PR #1341 was applied locally only as an independent temporary build dependency because the current base contains a separate natural-rotation WmTests compilation issue.

PR #1341 is not included in this branch.

Runtime execution on the official raphael ROM was not performed because the locally built WmTests.apk is signed with the AOSP platform test key, while the installed crDroid framework uses the crDroid platform key. Package verification was not bypassed.

This changes test code only; no production behavior is modified.

Stable patch-id:

371ea11a821e2556222e91d24e4699c9eb119311