Update suggestion ranking model coefficients.

- This is not a functional change and it only updates the model weights
which affects the ranking of suggestion items. The previous weights were
tuned to force the ranking to have immediate response to signal changes.
But, the current weights are tuned to maximize the user interactions
with suggestion.

Test: RunSettingsRoboTests & also manually testing suggestions
Bug: 64093782

Change-Id: I9f50ed6c4ed22d1a14110ec61156c14ba74aef64