Add support for inline catalog schemas in A2uiClientCapabilities

- Added `inlineCatalogs` parameter to `A2uiClientCapabilities` and updated `toPayloadMap()` to serialize inline catalog schemas.
- Added `isInline` property and `toSchemaMap()` extension function to `A2uiCoreCatalog`.
- Updated `A2uiCoreMessageProcessor` to filter inline catalogs and serialize them in `clientCapabilities`.

Bug: 537714970
Test: ./gradlew :a2ui:a2ui-engine:testReleaseUnitTest :a2ui:a2ui-model:testReleaseUnitTest :a2ui:compose:compose-runtime:testReleaseUnitTest :a2ui:compose:compose-ui:testReleaseUnitTest
Relnote: "Added support for advertising inline catalog schemas in `A2uiClientCapabilities` and `A2uiCoreCatalog`."
Change-Id: I973cf46461377312691d5549bced426a1725a1be