tree c7c383855c2d3197c85d6b4808df671f71f0f146
parent ea3ae03ec941f2088543d49232a5f61bd294a741
author Dan Shi <dshi@google.com> 1544483336 -0800
committer Dan Shi <dshi@google.com> 1545202697 -0800

android_test_mapping_format: Allow test config to have a `preferred_targets` attribute

The value of the `preferred_targets` attribute can only be a list of strings.

Bug: 113352287
Test: unitest
Change-Id: I29fde5cc325135c43911b71598b9ce706afd4df6