Increase bubble bar tap timeout

We were using only 100ms for bubble bar tap timeout. That made it
difficult to tap to expand the bubble bar.
The constant we were using, per javadoc, is for distinguishing scroll vs
tap.
Updating the timeout constant to long-press timeout value. If the tap is
shorter than the long-press timeout (400ms by default), it is considered
a tap.
This should make it easier to tap the bar.
Also fixing the long-press to drag timeout on the bubble bar. We were
using only half of the long-press timeout constant.

Bug: 385928447
Test: tap on bubble bar to expand it, long-press on bubble bar to move
Flag: com.android.wm.shell.enable_bubble_bar
Change-Id: I2df51a3caaa19ceb5b013d9377ebedd611ef84f3