Initial implementation of batch query for file paths coresponding to image URIs
MediaShareActivity.getFilesForImageUriList: Rename idList to idListBuilder
MediaShareActivity.getFilesForImageUriList: Create String variable idList to hold results of idListBuilder.toString
MediaShareActivity: From getFilesForImageUriList, move code for constructing ID list string to a spearate method constructIdListString
MediaShareActivity.constructIdListString: Make idListBuilder final
MediaShareActivity: Add javadoc for getFilesForImageUriList
MediaShareActivity.getFilesForImageUriList: Correct documentation in comments
MediaShareActivity: Remove unused method getFileForImageURI
MediaShareActivity.constructIdListString: Add code to validate parameter imageUriList - if it is null or empty, return empty string
MediaShareActivity: Add javadoc for constructIdListString
MediaShareActivity.buildUriDisplayString: Declare parameter and local variables as final
MediaShareActivity.constructIdListString: Add extra info to javadoc