[Inline Reply] Expand Notification on inline reply

activateRemoteInputOnExpanded is new activateRemoteInput, which expands Notification before activating remote input when it is not expanded

Bug: 346976443
Test: StatusBarRemoteInputCallbackTest and manual. Send HUN Notification with Notify and click reply. Observe inline reply activated on expanded notification.
Flag: com.android.systemui.expand_heads_up_on_inline_reply
Change-Id: If6df50c987d9ee1d6c088845619d631be1a7c789