Keep --input-list order.

Merging dex files starting with smaller ones can have
a big impact on performance as it potentially reduces
the number of compact events during the merge.

Gradle will now send the list sorted in ascending order
of file size, and dex should keep this order when parsing
the input list file.

Change-Id: Iff3ae4d30106fe70dca0764b33addfecceb84d09
Merge "Keep --input-list order."