The Settings and About fragments are arguably one logical layer below the PairingFragment (which feels like the "main screen").
Capture the back press and return to the PairingFragment.
Fixes https://bugs.kde.org/show_bug.cgi?id=442716.
Notes:
- In a DeviceFragment back-pressing continues to close the app, as before. Judging from the fact that the app persists the last selected device to the shared prefs, I assume this is a intentional.
- I also thought about storing from where the Settings/About were opened (e.g. from a specific DeviceFragment) and returning there. However this would be a much larger change with arguable user benefit. After all, from the PairingFragment it's just a single click to your device.
Set the title "Settings" to the action bar in the SettingsFragment.
Previously, depending on where you came from, it just read "KDE Connect Devices", "About" or the device name.
## Problem
On Android 10 (API 29) or later, when a trusted network has been configured, if the mobile device rejoins the network while KDE Connect is running in the background, it doesn't reconnect to any paired devices in the trusted network. It only reconnects when the user brings the app to the foreground.
## Cause
Android 10 introduced [a separate permission for background location access](https://developer.android.com/about/versions/10/privacy/changes#app-access-device-location).
When KDE Connect is running in the background with API 29+, [`TrustedNetworkHelper.currentSSID` fails to get the SSID](d22967f475/src/org/kde/kdeconnect/Helpers/TrustedNetworkHelper.java (L77)) because it doesn't have the required permission. This prevents KDE Connect from verifying whether a network is trusted.
## Solution
Make KDE Connect request for background location access permission.
To request for background location access, an app must [declare it in the manifest](https://developer.android.com/training/location/permissions#background), or else the option to to enable background location access won't appear in settings.
As a side note, the permission request dialog in `TrustedNetworksActivity` doesn't require changes because after Android 11, the option to allow background location no longer shows up in a dialog. [It has to be manually enabled in settings.](https://developer.android.com/training/location/permissions#background-dialog-target-sdk-version)
## Test Plan
### Before:
On Android 10 or later, configure a trusted network and pair with a device in it. Let KDE Connect run in the background. Disconnect from the trusted network and then rejoin. KDE Connect won't automatically reconnect to the paired device.
### After:
Do the same steps as above, except after configuring the trust network, go into settings and allow KDE Connect to access location all the time. After KDE Connect rejoins the trusted network, it should automatically reconnect to the paired device.
Adds the Android 8+ style adaptive icons, using the app's highlight color for extra contrast against the current fallback white background behind the white phone border. This new icon follows the size and grid guidelines of material design, and was created as a 108dp@1x svg
Added a screen to allow users to compose the key strokes to send. This is necessary because the keyboard that appears on the mouse pad screen does not have the voice to text microphone button on my phone. Even if it could be made to appear as it does on my tablet, some kind of text buffering is necessary because the voice text will change its mind.
