[1/2] Base: more addition for tinted system bar

add option to allow tinted color change window shade panel
improve tinted color logic code

Exodus:
Modified for Exodus, also includes AICP fixes:
https://github.com/AICP/frameworks_base/commit/bbe43cbc0a8d745f913a96e27e704b6b2a9ec0e1
https://github.com/AICP/frameworks_base/commit/0fadcbaf9f1f9aa92bec527646183565d4c5ee98

Change-Id: I9e4ca93d9dec29c5351e09fce64bf6bf124aa1cc