[SB][Notif] Enforce max width constraints on status bar chips.

Put max widths on both the text version of the chip and the timeDelta
version of the chip. Also removes the side paddings so we can get more
room. This might not be 100% to spec but it's close enough for teamfood.

Bug: 364653005
Test: Manual, see b/364653005#comment46
Flag: com.android.systemui.status_bar_notification_chips
Change-Id: Ib24df4a0557c8bc7dfc205a13bf67670e9b964bf