Revert hide logic in ImeInsetsSourceConsumer#setControl

CL[1] using isRequestedVisibleAwaitingControl() in
ImeInsetsSourceconsumer#setControl to hide IME surface when it returned
false without waiting control or requesting visible to deal with the
unexpecting hide IME cases during the testing.

However, when calling IMM#toggleSoftInput to reqest showing keyboard
on the dialog implicitly that will set requrested visible on both the
caller window and the dialog window, since toggleSoftInput didn't
explicit set the target window but just using the caller window as
requester implicitly.

It causes a regression that can't hide the IME surface when dismissing
the dialog to back to the caller window that the IME insets source
control is null but isRequestedVisibleAwaitingControl still returned
true because isRequestedVisible has been set true for the
toggerSoftInput caller window.

Revert logic in setControl to use mIsRequestedVisibleAwaitingControl
in case the IME surface won't be removed when backing to the implicit
caller window of toggleSoftInput.

[1]: I3071af14bf78e23f9526d6a9c138ab6ae2e0e339

Bug: 207092186
Bug: 204524304

Test: manual
Test: atest CtsInputMethodTestCases
Test: atest WindowInsetsAnimationControllerTests
Change-Id: Ic5265a6c3f2eba77d43832d23309998bf3cb1671