George Mount e196b6fefe Change getFragments() to return a List.
Bug 36762718
Bug 36982279

Changes getFragments() to return a List instead of a Collection.
The order is the order in which the fragment is added or attached.

Test: ran fragment cts tests
Change-Id: I10bbeef13e9154bbe052127cfa0e160b2e500b4d
2017-04-05 13:56:37 -07:00
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