Update status bar user chip view spec

Modified the margins, padding, and size of the user chip to match the
spec. Also use the outer status icon container for view margin
adjustments in KeyguardStatusBarView, since the margin adjustments only
used to work because the status icon container was always the first item
in the linear layout.

Test: visual on keyguard and unlocked status bar
Bug: 231688534
Change-Id: I8d766f4a2c630a3cbab7f0e5e7362652eb3e0478