增加自动填充支持

[blacklips]

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这样的功能 我不知道叫啥， gboard 和 fcitx5-android支持。 希望大佬加上这个功能

[tossmilestone]

同希望能增加这个功能，不然使用bitwarden太麻烦了

[WhiredPlanck]

#1162 正在进行

[goofyz]

Reference:

https://developer.android.com/identity/autofill/ime-autofill#configure-ime
https://medium.com/bobble-engineering/integrate-autofill-with-keyboards-or-input-method-editors-c715ee4b7e1