Add Icon component to A2uiBasicCatalogV1 and migrate the existing

MaterialIconComponent to implement the new A2uiBasicCatalogV1.Icon
interface.

Bug: 547851648
Test: A2uiBasicCatalogV1IconUiTest, A2uiBasicCatalogV1IconTest, MaterialA2uiBasicCatalogV1IconTest
Relnote: """Added `A2uiBasicCatalogV1.Icon`
    and `MaterialA2uiBasicCatalogV1Defaults.icon`."""
Change-Id: I655240181d4f69497bdefc9ecd729d1ea74ad0f2