Enforce that RuntimeShader is only hardware accelerated

Throw an illegal argument exception any time a Paint with
a RuntimeShader is attempted to be drawn into a software
canvas. Also mark that a Picture that uses a RuntimeShader is
properly marked as requiring hardware acceleration.
These tests check that the use of RuntimeShaders trigger

Bug: 189102731
Bug: 201546136
Test: atest CtsUiRenderingTestCases:RuntimeShaderTests
Change-Id: Id0ee4d1f05e2975031121298b45f925ee74f6818