Add customised log filtering for Android

When an app runs on Android, we currently expose *all* log messages generated by the app. In some circumstances, this can result in excessive logs being displayed.

`adb logcat` provides the ability to filter the log stream by log level and by component; a user should be able to configure this log level.

**Describe the solution you'd like**

It should be possible to pass one or more options to `briefcase run android` to:
* control the verbosity of the logs that are displayed to the user;
* exclude log messages from specific components; and/or
* reduce the output to *only* specific components

**Describe alternatives you've considered**

This could be achieved in multiple ways:

1. Exposing a single option that describes the full string of options passed to the `logcat` command (e.g., `--logcat "-s *:I Python:E`). This is the most flexible option, as it exposes *any* capability of `adb logcat`.
2. Exposing a multi-use option to define individual arguments to pass to `logcat` (e.g., `--logcat "-s" --logcat "*:I" --logcat Python:E`) This has the flexibility of option (1), but removes the need to parse the filter into individual arguments; however, it is more verbose.
3. Exposing a high-level `--debuglog` option that enables/disables a filter to include DEBUG level output. This option requires less expertise on the part of the end-user, but removes considerable flexibility. However, from the perspective of the end user, it's more likely to be aligned with their needs - display "just the important logs" by default, but provide an easy option to get everything else.

**Additional context**

This is an extension of #821, introduced to address #814.

#821 deliberately adds a filter for `EGL_emulation` messages because they are excessively verbose; this indicates that there is a *some* need to filter logs.