[FR] Option for mobile-install command to install to all connected devices

This is a feature request to support the use case of running `mobile-install` on multiple connected devices. Currently `mobile-install` needs to be invoked multiple times with `--adb_arg=-s --adb_arg=` for each ADB connected device.

[Buck's install command](https://buck.build/command/install.html) has a multi-install mode which enumerates connected devices and installs to all of them, a similar option would be helpful in Bazel.

> `-all` `(-x)` Install APK on all connected devices and/or emulators (multi-install mode).