Mirrors the ToolsNode enum.
For more information about the attribute, see Android's documentation: ToolsNode attribute
| Null | Attribute is not set and will not appear in the element. |
| Merge | Mirrors tools:node="merge". |
| MergeOnlyAttributes | Mirrors tools:node="merge-only-attributes". |
| Remove | Mirrors tools:node="remove". |
| RemoveALl | Mirrors tools:node="removeAll". |
| Replace | Mirrors tools:node="replace". |
| Strict | Mirrors tools:node="strict". |