Google Play is now blocking distribution for Android TV unless we
explicitly set the android.hardware.microphone hardware feature as
android:required="false", because it's inferring
android.hardware.microphone from the android.permission.RECORD_AUDIO we
added for Wii Speak emulation, with android:required defaulting to true.
I was under the belief that setting android:required="false" on
android.permission.RECORD_AUDIO would solve this, but looking closer at
the definition of <uses-permission>, it doesn't actually support
android:required attributes, so that presumably has no effect.

IOS/USB: Emulate Wii Speak using cubeb

Android: Don't dismiss AdvancedMappingDialog when pressing Clear

If you already have a mapping set in the advanced mapping dialog and
want to change it, the easiest way to do it is to press Clear and then
select the new mapping from the list. But pressing Clear causes the
dialog to close, forcing you to open it again, which is inconvenient.
This commit makes it so the Clear button doesn't close the dialog.

Add VBI Frequency Override

This feature allows overriding the frequency of the Vertical Blank Interrupt. For many games, this means that their gameplay speed will change without affecting audio, which would be useful by itself (e.g. grinding in RPGs).

However, there are games that use delta time for their game logic, which allows them to be played at >60 FPS at the same gameplay speed!

Some games aren't dynamic though, and require a patch to adjust their game speed variable.

Android: Apply style alignment refactorings

Old cruft from when the Android code was loading INI files manually.
We don't have any handling for failing to load settings anymore.

This change also updates related comments to reflect how things actually
work nowadays.