Update KeyguardStatusBar views w/ display change

Implement BatteryMeterView's onConfigurationChanged to show correct
battery percentage text size.
Re-add icon groups if display changed to show correct size of system
icons.

Manually check keyguard status bar layout w/ following cases
1. Settings - Display - Display Size
2. RTL or LTR

Bug: 197291570
Test: atest SystemUITests
Change-Id: I3719b957b48f1dba81aedac5a7feb18323244429