[SB][Chips] Increase padding between chips, and between clock & notifs.

1) Increase end padding for the clock so there's more space clock <->
   notifs and more space clock <-> chip
2) Increase padding between chips.

Fixes: 405105242
Bug: 405164830
Bug: 364653005
Flag: EXEMPT bugfix

Test: verify slightly more padding between clock & chip
Test: verify more padding between multiple chips
Test: verify more space between status bar clock & notification icons,
in LTR and RTL and at large & small font sizes, with
status_bar_root_modernization both enabled & disabled

Change-Id: I9362c4dac5ce2401e097bcc4cda4a22adab57409