ArduinoDroid - Arduino/ESP IDE

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* Fixed: compilation issue (avr-g++[1]: syntax error: unexpected '4Lg)
* AVR GCC toolchain updated to 7.3.0
* Arduino libraries updated to 2.3.6
* Fixed: uploading issue on recent Android versions
* Fixed: Dropbox integration
* FIxed: Google Drive integration (drive_file scope only)
* Fixed: minor issues
* "Application updated" notification added (please grant access in Android settings)
* Added translations to German, French, Italian, Spanish, Portuguese, Japan and Korean languages.