[MB-1974] iOS foreground presentation support.

[hcrowell]

Added iOS 10 foreground presentation support.

Specify the optional default foreground presentation options for iOS 10 via the tiapp.xml:

<!-- iOS 10 alert foreground notification presentation option -->
<property name="com.urbanairship.ios_foreground_notification_presentation_alert" type="bool">true</property>
<!-- iOS 10 badge foreground notification presentation option -->
<property name="com.urbanairship.ios_foreground_notification_presentation_badge" type="bool">true</property>
<!-- iOS 10 sound foreground notification presentation option -->
<property name="com.urbanairship.ios_foreground_notification_presentation_sound" type="bool">true</property>

Testing:

• Tested foreground notification presentation options on iOS 10.0.2 iPod

[crow]

🍔

[rlepinski]

👍