Support getting app meta for apps that are already installed

[baltpeter]

Currently, we only support getting metadata for apps from files, through parseAppMeta().

In CA, we want to add various metadata, including app meta, to our HAR exports (see tweaselORG/cyanoacrylate#39). Not super critical, but for that it would be useful to also support getting metadata for apps that are already installed on the device.

[baltpeter]

Random find: On iOS, the same metadata we're parsing in IPAs might just be on the filesystem?

https://old.reddit.com/r/jailbreak/comments/4w0svm/question_where_can_i_find_itunesmetadataplist_on/d630u7n/
https://awesome.hackpuntes.com/ios/how-to-extract-ipa-from-ios-device

[baltpeter]

And for determining how an Android app was installed: https://stackoverflow.com/questions/10809438/how-to-know-an-application-is-installed-from-google-play-or-side-load

[baltpeter]

On Android, we could just temporarily grab the APK: https://gist.github.com/ctrl-freak/24ac0e61b7cf550a6945

[baltpeter]

On Android, we could just temporarily grab the APK: https://gist.github.com/ctrl-freak/24ac0e61b7cf550a6945

Though, pulling the whole APK will probably take too long, especially since we would like to have a list of the names of all apps installed on the device for CLI.

[baltpeter]

Previous investigation was hard to find because it was documented in an issue that was only slightly related: tweaselORG/cli#27