Added support for profile-based tests and text profiles.

Bug: 117893936, 118440061, 113905932, 116749375
Test: composer/host/tests/../ProfileTest.java &
composer/platform/tests/../ProfileTest.java; build test-composers and
look for the assets/ directory in the .jar file.

Change-Id: I3e80c75c47abdaca4d58c9f9bdba49a4a08bc0bb
Merged-In: I1fc8e74cae363ed268d7efaeea468e3d183c5854
Merged-In: I947f9eef5c604ce56ec5e4d0d3719fdec78537a7