Revert "Enable IMS#canImeRenderGesturalNavButtons() by default"

This reverts commit 793e15271306d84451733363818e83e661112d44 [1].

Reason for revert:
No back button on the setup wizard.

 [1]: I45e511f5cfec93cdd002d23c091b4fe735b28227

Bug: 215545985
Fix: 217668258
Change-Id: Iac77c5bfafc5d208a1d3f3b56f0f7ee81d51031b
1 file changed