Align Keyguard statusBar margin padding to phone's

Align Keyguard status bar magin and padding to phone's through adding
missing layout factor privacy dot space to the edge of screen, and use
status_bar_padding_end to repleace system_icons_keyguard_padding_end.

Manually check layout for following cases

1. Check battery icon, battery percentage, wifi icon at the same status
bar location between keyguard locked and unlocked with following
scenarios.
  a. w/ or w/o battery percentage
  b. RTL or LTR
2. Check multi-user icon looks good.

Test: atest SystemUITests
Test: Manually check phone status bar and keyguard status bar

Bug: 195670442

Change-Id: Id38b64117e952b13937d80e77260e8a8c2b76594