[Android] All changes for next release

[gmiszewski-intent]

Updated Android library.

• current build tools
• minSdk 23
• targetSdk 33
• added support for new Permissions in manifest
• migrated to AndroidX
• migrated to last version of rxandroidble2 library
• migrated to RxJava2
• usage of new Java language features
• small refactor
• created small SampleApp module (as a part of refactor process)

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