Scale icons from search to make app icons big like AA -> workspace

when dragging from search.

To scale the icon during dragging (instead of long press) I created a scale variable within DragOptions
so that right before dragStart gets called in DragController.java (in callOnDragStart())
the dragview scales before dragging..
 * note: the scale from search is 1.687 and the scale from allApps is 1.107
- included searchResult and smallSearchResult
- Added animation for scaling icon (used Interpolators.EMPHASIZED 500ms as suggested by motion designer)
- Cancel animation when drag finishes

bug: 222666176
test: Manual - after: https://drive.google.com/file/d/1ZZHnXlzdTxlM-RUIdJ6EOYkPPg6tCUxC/view?usp=sharing
before: https://drive.google.com/file/d/1NpBz3kT_slHXtpXObr_G8K6SZYG9_bLX/view?usp=sharing

Change-Id: I01309a3be928987ba00422ad947b80a3df865973