Install error on Android 12 (API 31)

[jsimonassi]

After upgrade my targetSdkVersion to 31, i get:

Installation failed due to: 'INSTALL_PARSE_FAILED_MANIFEST_MALFORMED: Failed parse during installPackageLI: /data/app/vmdl1994241153.tmp/base.apk (at Binary XML file line #227): com.marianhello.bgloc.sync.AuthenticatorService: Targeting S+ (version 31 and above) requires that an explicit value for android:exported be defined when intent filters are present'

i will open a PR to Fix it.