Revert "Add a test for Tab key on a multiline textfield."

This reverts commit 6f7f4b6b748c92f3d319482506e19b35d62c3191.

Reason for revert: The behavior change broke the apps depending on the
previous behavior.

Bug: 154290658
Test: atest TextViewTest#testKeyNavigation
Change-Id: Ifea0ea8caf6384f3bef24756d3a3ef39a8c4acaa
1 file changed