Missing `Tooltip` component implementation

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**Description:**
The `Tooltip` component is still not implemented in Material Components for Android, despite being included in the design/specification since the very first version of the library.

The component has been part of the specification across multiple major iterations of the library, including the current one. However, it has never been delivered in any released version.

This creates a gap between the documented/design system specification and the actual component library implementation. Since `Tooltip` is a core UI pattern, its absence reduces consistency and forces product teams to create custom solutions outside the library.

**Expected result:**
Implement the `Tooltip` component in the library according to the approved specification/design guidelines.

**Actual result:**
`Tooltip` remains missing from the library, although it has been present in the specification since the initial version.

**References:**
- https://m1.material.io/components/tooltips.html
- https://m2.material.io/components/tooltips
- https://m3.material.io/components/tooltips

Start with the linked Material 1, 2, and 3 tooltip specifications, then inspect the repository for the appropriate component entry point. No implementation files or tests are named, so the scope must first be defined from the approved guidelines; done means a released Tooltip component matching that specification.

Written by the indexing model from the issue text.