CR: better method names

// FREEBIE

Signal/src/ViewControllers/GifPicker/GifPickerCell.swift

@@ -110,7 +110,7 @@ class GifPickerCell: UICollectionViewCell {
 
         // Record high quality animated rendition, but to save bandwidth, don't start downloading
         // until it's selected.
-        guard let highQualityAnimatedRendition = imageInfo.pickHighQualityAnimatedRendition() else {
+        guard let highQualityAnimatedRendition = imageInfo.pickSendingRendition() else {
             Logger.warn("\(TAG) could not pick gif rendition: \(imageInfo.giphyId)")
             clearAssetRequests()
             return
@@ -119,7 +119,7 @@ class GifPickerCell: UICollectionViewCell {
 
         // The Giphy API returns a slew of "renditions" for a given image. 
         // It's critical that we carefully "pick" the best rendition to use.
-        guard let animatedRendition = imageInfo.pickAnimatedRendition() else {
+        guard let animatedRendition = imageInfo.pickPreviewRendition() else {
             Logger.warn("\(TAG) could not pick gif rendition: \(imageInfo.giphyId)")
             clearAssetRequests()
             return

Signal/src/network/GiphyAPI.swift

@@ -125,7 +125,7 @@ extension GiphyError: LocalizedError {
         return pickRendition(renditionType: .stillPreview, pickingStrategy:.smallerIsBetter, maxFileSize:kPreferedPreviewFileSize)
     }
 
-    public func pickAnimatedRendition() -> GiphyRendition? {
+    public func pickPreviewRendition() -> GiphyRendition? {
         // Try to pick a small file...
         if let rendition = pickRendition(renditionType: .animatedLowQuality, pickingStrategy:.largerIsBetter, maxFileSize:kPreferedPreviewFileSize) {
             return rendition
@@ -138,7 +138,7 @@ extension GiphyError: LocalizedError {
         return pickRendition(renditionType: .animatedLowQuality, pickingStrategy:.smallerIsBetter, maxFileSize:kPreferedPreviewFileSize * 3)
     }
 
-    public func pickHighQualityAnimatedRendition() -> GiphyRendition? {
+    public func pickSendingRendition() -> GiphyRendition? {
         // Try to pick a small file...
         if let rendition = pickRendition(renditionType: .animatedHighQuality, pickingStrategy:.largerIsBetter, maxFileSize:kPreferedSendingFileSize) {
             return rendition