Deprecate setViewContent

Relnote: setViewContent was deprecated. setContent should be used instead.
Bug: 160335130
Test: ./gradlew buildOnServer
Change-Id: I7e49740d26f42e9326cb5582a4522d74957b90fe

• compose/compose-runtime/src/androidAndroidTest/kotlin/androidx/compose/runtime/BaseComposeTest.kt[diff]
• ui/ui-android-view/integration-tests/android-view-demos/src/main/java/androidx/ui/androidview/demos/WebComponentActivity.kt[diff]
• ui/ui-android-view/src/main/java/androidx/ui/androidview/adapters/ArrayAdapter.kt[diff]
• ui/ui-core/api/current.txt[diff]
• ui/ui-core/api/public_plus_experimental_current.txt[diff]
• ui/ui-core/api/restricted_current.txt[diff]
• ui/ui-core/src/androidMain/kotlin/androidx/compose/ui/platform/Wrapper.kt[diff]