Fix take picture with low resolution#268

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IvanBean wants to merge 2 commits intogooglesamples:masterfrom

IvanBean:master

Commits on Oct 2, 2017

Make sure supportedPictureSizes order from large to small
IvanBean
committed

Commits on Oct 6, 2017

Make sure supportedPictureSizes order from highest to lowest
IvanBean
committed