We don't require high precision in the calculation of `percentDownloaded` for `Downloader.ProgressListener.onProgress` though, when `byteCached == contentLength`, we hope the `percentDownloaded` to be `100f` (rather than `99.99999f`). The result of `byteCached * 100f` can be less precise as the floating-point numbers are sparser when the value is far from zero. For example, if `byteCached == 812345L`, then the `byteCached * 100f` will become `81234496` (value checked by `BigDecimal`).
PiperOrigin-RevId: 741895445
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