Fix wrong notification content alpha

Fix the wrong notification content alpha values when swiping animation
is interrupted.
This change ensures:
When the notification row's swiping progress is reset, the alpha is also
reset to 1.
When the Shade closes/opens, all the notification rows in the list is
reset.

Fix: 355132257
Bug: 292024656
Test: atest SystemUITests
Flag: com.android.systemui.notification_content_alpha_optimization
Change-Id: I4bd2bc4c7944221c78b34a4c3206eac67bbab4a2