supporting using AVCapturePhotoSettings to support ios10+#3

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jguffey wants to merge 5 commits intomasterfrom

ios-12-4-compatible

Commits on Aug 24, 2019

supporting using AVCapturePhotoSettings to support ios10+
jguffey
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Commits on Aug 26, 2019

Commits on Aug 29, 2019

use recommended settings and resolve all warnings
jguffey
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