When AllAppsSearchBarController's mInput edit text focus is false, we should hidekeyboard.

The searchEditText has focusableInTouchMode = true, See https://source.corp.google.com/h/googleplex-android/platform/superproject/main/+/main:vendor/unbundled_google/packages/NexusLauncher/res/layout/typeahead_search_input.xml;l=47;drc=199723c3c6db539cce4c03b5b612015fe040b202

See https://developer.android.com/reference/android/view/View#attr_android:focusableInTouchMode which says "Boolean that controls whether a view can take focus while in touch mode. If this is true for a view, that view can gain focus when clicked on, and can keep focus if another view is clicked on that doesn't have this attribute set to true."

So when external keyboard is connected and we come out of all apps in touch mode, the edit text still has focus in touch mode and continues to keep focus even though clearFocus() is called. So we hide the keyboard so that input connection is not established with edit text anymore.

Before: https://b.corp.google.com/issues/317742889#comment22

After: https://b.corp.google.com/issues/317742889#comment23

Bug: 317742889
Flag: NA
Test: Manual
Change-Id: Ib297b4cdf376d41e244d2b798a101e4255de5108