Support to Import and Export App Internal Data

[WhiredPlanck]

Pull request

Issue tracker

Fixes will automatically close the related issues

Fixes #1274

Feature

Describe features of this pull request

Code of conduct

• CONTRIBUTING

Style lint

• make sytle-lint

Build pass

• make debug

Manually test

• Done

Code Review

1. No wildcards import
2. Manual build and test pass
3. GitHub Action CI pass
4. At least one contributor review and approve
5. Merged clean without conflicts
6. PR will be merged by rebase upstream base

Daily build

Login and download artifact at https://github.com/osfans/trime/actions

Additional Info

[Bambooin]

Concern about the data privacy and security issue due to app internal data with clipboard.

[WhiredPlanck]

Concern about the data privacy and security issue due to app internal data with clipboard.

People believe if an attacker is able to access your local data or even perform the action inside the app, no amount of strong security measures will help

[goofyz]

Concern about the data privacy and security issue due to app internal data with clipboard.

People believe if an attacker is able to access your local data or even perform the action inside the app, no amount of strong security measures will help

I think adding a warning message to warn users that clipboard data will be exported and readable will be enough.

[WhiredPlanck]

@goofyz Some people suggests that we can encrypt the exported compression package

[goofyz]

Maybe don't include "clipiboard" data when exporting?
By the way, is there any user requesting this feature?

[WhiredPlanck]

Maybe don't include "clipiboard" data when exporting? By the way, is there any user requesting this feature?

Related issue: #1274 , implementation ref: https://github.com/fcitx5-android/fcitx5-android/blob/59558c5b624359455911082b10750f4dcbd10fe8/app/src/main/java/org/fcitx/fcitx5/android/data/UserDataManager.kt