Refactor TestUtils::drawUtf8ToCanvas usage in macrobench tests

Set text encoding inside TestUtils::drawUtf8ToCanvas and use
TestUtils::drawUtf8ToCanvas instead Canvas::drawText.
This CL is a follow-up of ag/3287411.

Test: Ran macrobench tests
Change-Id: I1b2f014d17f26ccc8fbdae9cfeea4ac25fd4c51f
12 files changed