[indicators] + [mobile] hide indicator bar when mobile devices rotate into landscape

[Olga Kemmet]

Issue:
In the current build the landscape mode is showing indicators in apps which are using it. Displaying the indicator bar takes away some screen estate, especially when the OSK is visible as well. Design and SDK are working on reducing the header hight when mobile devices are rotated into landscape but hiding indicators needs to be done system wide.

---------------- UX comment | desired resolution ------------------

Please ensure that if a mobile devices rotates into landscape mode the indicator bar is hidden automatically. Indicators should be still available by swiping from the top edge.

For visual/UX reference please refer to this spec: https://docs.google.com/document/d/1nFm8xiYhKXXuEO_IvMXoD0lASbYzYXva1BWMVanU3iw/edit?pli=1#heading=h.sdqqbpcpmqmd

Also, please refer to attachement

[Michał Sawicz (saviq)]

What should the minimum height threshold be for when the indicator bar is supposed to be hidden? I don't imagine you want to hide it on a device like the Nexus 7, where landscape is the default orientation?

[Olga Kemmet (olga-kemmet)]

We had a little bit of a discussion with Gerry, Ben and myself. The rule we came up with is as follows:
Every single time the OSK pops up in landscape mode, indicators are hidden. This applies only for phones and tablets.