Increase the delay in between gesture tutorials

The time in between each gesture's finish page and the start of the next
gesture tutorial was too short. We increased the time we spend on the
finish page by 1000 ms based on this feedback.

Fix: 293967263
Test: Run through the gesture tutorial and note the longer pause in
between each gesture
Flag: LEGACY ENABLE_NEW_GESTURE_NAV_TUTORIAL ENABLED

Change-Id: I2c22e19dff91ac720877e596df90efe7f3cfcd80