Add an option to disable code decompilation

[threethan]

Old Behavior:

• Dex-to-smali decompilation is always enabled
• Exploring applications with a lot of code is always slow

New Behavior:

• Dex-to-smali decompilation is enabled by default, but may be disabled by the user
• Exploring applications with a lot of code is much faster if decompilation is disabled

Decompilation of dex to smali is a great feature, but accounts for most of the time it takes to open most apk files.

This PR adds an option to the settings which allows you to disable decompilation of dex files. Skipping this works fine, as AEE already uses unmodified dex files for rebuilding if no smali changes were made.

Caveats:

• Cached applications will stay with the setting from when the cache was made, leading to the following possiblity:
  1. User disables decompilation
  2. User opens foo.apk
  3. User closes foo.apk, and it is automatically cached
  4. User enables decompilation
  5. User opens foo.apk
  6. foo.apk is loaded from cache and not decompiled
• A few strings have been added, which are only in English

Includes the same AGP update as my other commit.
Includes a fix for a minor issue where "textTwo" and "icon" could be hidden when a setting was changed.

[apk-editor]

@threethan
Thanks for this PR, which is already in my to-do list. I was postponed it becasue I have to find a way to decompile dex files independantly (if the user decided to do so). Right now, the original APK file is requried. I'll merge it anyway, with some cosmetic modifications soon.

[threethan]

That would definitely be the best option, but this was easier to implement. Glad to help with your backlog.