[RenderScript] Implement BLAS in support lib.

  - Works in compat mode
  - Native mode is enabled if targetSdkVersion >= 23 and deviceAPI >= 23
  - As other intrinsics, if set targetSdkVersion = 21, Incremental
    Support (hybrid mode) will be enabled on device running L or later.

  bug: 21902810

(cherry picked from commit 8dab1e59827244f84ceb73c5eb24427223b58b21)

Change-Id: I62410d174a60ab2a284cc94e8a1f6fcd70b7e102
6 files changed