adding Lab6_NotificatonsLab

...ficationsLab/app/src/main/res/mipmap-ldpi/ic_launcher.png

...ficationsLab/app/src/main/res/mipmap-mdpi/ic_launcher.png

...icationsLab/app/src/main/res/mipmap-xhdpi/ic_launcher.png

labs/Lab6_NotificationsLab/app/src/main/res/raw/ladygaga.txt

...b6_NotificationsLab/app/src/main/res/raw/rebeccablack.txt

...ab6_NotificationsLab/app/src/main/res/raw/taylorswift.txt

.../Lab6_NotificationsLab/app/src/main/res/values/dimens.xml

...Lab6_NotificationsLab/app/src/main/res/values/strings.xml

.../Lab6_NotificationsLab/app/src/main/res/values/styles.xml

...tificationsLab/app/src/main/res/xml/backup_descriptor.xml

labs/Lab6_NotificationsLab/build.gradle

labs/Lab6_NotificationsLab/gradle/wrapper/gradle-wrapper.jar

...NotificationsLab/gradle/wrapper/gradle-wrapper.properties

labs/Lab6_NotificationsLab/gradlew

labs/Lab6_NotificationsLab/gradlew.bat

labs/Lab6_NotificationsLab/settings.gradle