Update pattern bouncer to match spec

Alternative approaches considered:
 1. For size dimensions, adding flag check in LockPatternView constructor and reading different dimens constants, however this might break wear resource overlay or we have to add a check to exclude using the new dimens
 2. For colors, setting the color attributes using style attributes, however it is not easy to flag check this and would require adding another method to LockPatternView to read and init values based on a new style attribute.

Fixes: 394135697
Test: verified manually
Flag: com.android.systemui.bouncer_ui_revamp_2
Change-Id: I2755eaf87ff4518c982fdad9b7ecc42301c1ed7d