lineage-sdk

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Steve Kondik e8aecd3a8a cmsdk: Ensure CMHW feature constants aren't optimized out

* The preferences constraints system uses reflection to look up
   fields via strings, we need to ensure they are not optimized
   out by Proguard. Alternatively we can manually enumerate them,
   but it's yet another list of constants to maintain. We should
   have used a proper enumeration to begin with, but so it goes.
 * The @VisibleForTesting annotation is honored by the platform for
   ensuring that Proguard doesn't stomp fields. The support library
   has an @Keep annotation, but it's only supported by Gradle. If
   it becomes supported by the platform in the future, switch to
   it instead.
 * Also add tests for all of this.

Change-Id: I9f324e003e2a9de5604085b978d5f95bdd098d32

2016-11-22 22:48:35 -08:00