Please remove device model and detailed system version from the User-agent of Element's request

### Steps to reproduce

1. Start a Matrix server (behind reverse proxy, with logging configured) and use Element Android App to sign in.
2. Use App normally

### Outcome

#### What did you expect?
See no detailed information about user's phone logged in the log of reverse proxy.

#### What happened instead?
Detailed device model and Android version (including the version of 3rd-party ROM) is sent in User-Agent of requests sent to reverse proxy, which is unnecessary for server owner anyway and a blatant violation of users' privacy.

```
203.0.113.100 - - [26/Feb/2024:11:01:52 +0600] "GET /_matrix/client/versions HTTP/1.1" 200 125 "-" "Element/1.6.10 (SAMSUNG SM-A236B; Android 13; lineageos-userdebug 13 1111.222222.001 29d80bfc2d; Flavour FDroid; MatrixAndroidSdk2 1.6.10)"
203.0.113.100 - - [26/Feb/2024:11:01:53 +0600] "GET /_matrix/client/r0/devices HTTP/1.1" 200 122 "-" "Element/1.6.10 (SAMSUNG SM-A236B; Android 13; lineageos-userdebug 13 1111.222222.001 29d80bfc2d; Flavour FDroid; MatrixAndroidSdk2 1.6.10)"
203.0.113.100 - - [26/Feb/2024:11:01:53 +0600] "GET /_matrix/client/r0/sync?filter=lctK&set_presence=online&timeout=0&since=1237 HTTP/1.1" 200 115 "-" "Element/1.6.10 (SAMSUNG SM-A236B; Android 13; lineageos-userdebug 13 1111.222222.001 29d80bfc2d; Flavour FDroid; MatrixAndroidSdk2 1.6.10)"
203.0.113.100 - - [26/Feb/2024:11:01:53 +0600] "GET /_matrix/client/unstable/room_keys/version HTTP/1.1" 404 75 "-" "Element/1.6.10 (SAMSUNG SM-A236B; Android 13; lineageos-userdebug 13 1111.222222.001 29d80bfc2d; Flavour FDroid; MatrixAndroidSdk2 1.6.10)"
```

#### Other note
This issue was originally sent as a discussion thread but received no reply from Element officials so I'm elevating it here.
https://github.com/element-hq/element-meta/discussions/2309

Please don't hesitate to close with `INTENDED` or `NOTABUG` to clarify your stance on user privacy.

### Your phone model

SAMSUNG SM-A236B

### Operating system version

Android 13

### Application version and app store

Element 1.6.10 from F-Droid

### Homeserver

Conduit 0.7.0

### Will you send logs?

No

### Are you willing to provide a PR?

No