ui: Check for bootreason=recovery_ui.

Some wear bootloaders are passing bootreason=recovery_ui when booting
into recovery from fastboot, or via 'adb reboot recovery'. Allow turning
on text mode with a swipe for such a bootreason. Since we will turn on
text mode automatically for debuggable builds, this bootreason mainly
handles the case for user builds.

Note this change only applies to devices that allow touch screen inputs.

Bug: 36169090
Bug: 64307776
Test: Build and boot into user build recovery image. Toggle on text mode
      with a swipe.
Change-Id: I55f19aed7b210352f8370de19935b4772cc12095
(cherry picked from commit 046aae29d9b0d2cdf24ad0567146991c3864c140)