Update old content of Qt for Android documentation

The Android documentation needs an update to many pages with old content, we have a list (QTBUG-79665) of pages that needs to be checked, but this task should ensure all documentation pages under Qt for Android have to be updated.

Android Services

• Adding services docs and Manifest file are not in sync (point one in docs says Manifest should contain a section for Services which is not there in source files)

• Qt Android services page is short and limited, we should provide enough code snippets for users to easily set the environment. Also, it's good practice to list known issues/bugs such as QTBUG-78009

Creating Qt Quick Projects: Include a note that qtvirtualkeyboard not enabled by default for mobile platforms, either the code shouldn't use it or the user has to install it manually.

Android Building

• Warn about OpenJDK 11 not usable.
• Fix the "text walls" that are badly formatted and not clear to read.

Third-party Android Libraries

• Manifest button location is not precise in docs, it should be "create a template in Projects settings under Build Android APK - NOT - Create AndroidManifest.xml button in the Deployment settings of your project.
• The path that the guide relies on doesn't exist ($ANDROID_SDK_ROOT/extras/google/google_play_services/libproject/google-play-services_lib)

Deploying an Application on Android

• The "android" tool is deprecated
• Improve the formatting and structure of docs paragraphs, for example, arguments of androiddeplyqt tool are not easily readable because of the long paragraphs with small spacing.