Merge "Export mainDexClasses*.rules for MultiDexLegacy tests" am: 8ec286ef38 am: 8a1ce8888c am: 5f7ba6458f am: 7415ea4c68 am: d8905ce25b

Original change: https://android-review.googlesource.com/c/platform/dalvik/+/1828916

Change-Id: I628aa8fb174467528a8b16b91680892ce0743515