decouple Bubble from NotificationEntry

1. decouple Bubble from NotificationEntry
2. save title from Bubble into BubbleEntity
3. copied boolean values from NotificationEntry into Bubble for UI
variants (e.g. isVisuallyInterruptive, isClearable,
shouldSuppressNotificationDot... e.t.c)

Bug: 151474524, 159061670
Change-Id: I606c6ff93b3dc3867b4d0a6129d7117d9999c170
Test: atest android.app.cts.NotificationManagerTest

This reverts commit 2e73117c.

Reason for revert: issue fixed, rolling forward again

Change-Id: I1180954a76bee9782df46de0f202c614f05d560f