Stop checking FeatureFlags for People Tile.

Revert "Use FeatureFlags to enable People Space"

Revert "Use FeatureFlags to enable People Space"

Revert "Exclude PeopleSpaceWidgetEnabler from Car"

Revert submission 13586906-people_space_feature_flag_enable

Reason for revert: Performance regression on idle
Reverted Changes:
I879e86ca3:Exclude PeopleSpaceWidgetEnabler from Car
I6361985bc:Use FeatureFlags to enable People Space
Ie6758b764:Use FeatureFlags to enable People Space

Change-Id: I4da384de8524f60ba0fd203bee811aae2c81308f
Test: manual