[Dialogs] Consider all actions alignments for vertical layouts

[galiak11]

Description

Implement leading, center, trailing and justified alignment for actions in vertical layout.
When there is not enough space for action to align horizontally, they automatically switch to vertical layout. The default alignment in vertical layout is centered, unless configured by actionsHorizontalAlignmentInVerticalLayout.

Note that actions alignment API is still under development and is in a private header.

Issue

b/122654717, cl/297554381

[material-automation]

bazel detected changes to the following targets:

//catalog:MDCCatalog
//catalog:MDCCatalog.apple_binary
//catalog:MDCCatalog.swift_runtime_linkopts
//catalog:MDCCatalogLib
//components/Dialogs:ColorThemer
//components/Dialogs:DialogThemer
//components/Dialogs:Dialogs
//components/Dialogs:ObjcExamples
//components/Dialogs:SwiftExamples
//components/Dialogs:Theming
//components/Dialogs:TypographyThemer
//components/Dialogs:snapshot_test_lib
//components/Dialogs:snapshot_tests
//components/Dialogs:snapshot_tests.swift_runtime_linkopts
//components/Dialogs:snapshot_tests_test_binary
//components/Dialogs:snapshot_tests_test_bundle
//components/Dialogs:unit_test_sources
//components/Dialogs:unit_test_swift_sources
//components/Dialogs:unit_tests
//components/Dialogs:unit_tests_IPAD_PRO_12_9_IN_9_3
//components/Dialogs:unit_tests_IPAD_PRO_12_9_IN_9_3.swift_runtime_linkopts
//components/Dialogs:unit_tests_IPAD_PRO_12_9_IN_9_3_test_binary
//components/Dialogs:unit_tests_IPAD_PRO_12_9_IN_9_3_test_bundle
//components/Dialogs:unit_tests_IPHONE_7_PLUS_IN_10_3
//components/Dialogs:unit_tests_IPHONE_7_PLUS_IN_10_3.swift_runtime_linkopts
//components/Dialogs:unit_tests_IPHONE_7_PLUS_IN_10_3_test_binary
//components/Dialogs:unit_tests_IPHONE_7_PLUS_IN_10_3_test_bundle
//components/Dialogs:unit_tests_environment
//components/Dialogs:unit_tests_environment.swift_runtime_linkopts
//components/Dialogs:unit_tests_environment_test_binary
//components/Dialogs:unit_tests_environment_test_bundle

[andrewoverton]

LGTM under the same conditions as #9805