SF: Move/Refactor doComposition and doDisplayComposition to CompositionEngine

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Test: atest CtsColorModeTestCases
Test: atest CtsDisplayTestCases
Test: atest CtsGraphicsTestCases
Test: atest CtsUiRenderingTestCases
Test: atest CtsViewTestCases
Test: atest android.media.cts.EncodeVirtualDisplayWithCompositionTest
Bug: 121291683

Change-Id: I6c796ec613ce163764a403bcd669dab38300f437