docs: add android docs · fluttercommunity/flutter_workmanager@737bdc3

File Length Violation: File should contain 400 lines or less: currently contains 495 (file_length)

Line Length Violation: Line should be 120 characters or less; currently it has 122 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 144 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 129 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 130 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 122 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 127 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 133 characters (line_length)

Line Length Violation: Line should be 120 characters or less; currently it has 160 characters (line_length)

Nesting Violation: Types should be nested at most 1 level deep (nesting)

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