Adding privacy indicators to split shade header

This change extracts privacy indicators logic from QuickStatusBarHeaderController to a separate class - HeaderPrivacyIconsController - and then uses that controller in SplitShadeHeaderController.
Analogically, privacy-related tests are moved to HeaderPrivacyIconsControllerTest.

Fixes: 195271863
Test: All tests in com.android.systemui.qs
Change-Id: I80e1e808d54c4da1b91a38e8140430edf5a57504
10 files changed