There is a "fake" header that always exists for the "Beta" podspec target. It
was accidentally not renamed from "Alpha" in an earlier PR that changed Alpha
to Beta.
This reverts commit fdaf872c605cab44a4579cb8b7f0ea168c445318. The
container scheme import is missing in a Swift example.
```
material_components_ios/components/Cards/examples/EditReorderCollectionViewController.swift:38:24 use of undeclared type 'MDCContainerScheming'
var containerScheme: MDCContainerScheming {
^~~~~~~~~~~~~~~~~~~~
```
Reopens#6030
This is an automated change generated by replacing all instances of MaterialComponentsAlpha with MaterialComponentsBeta. This is not a breaking change because changes to Alpha/Beta components (including renaming them) are not considered breaking.
The MaterialComponentsAlpha podspec was mistakenly named Alpha, when what we meant was more close to Beta. The distinction is that Alpha components are not expected to be used by clients, while Beta components are.
