adding week 2 labs

labs/Lab2_Activity/.gitignore

labs/Lab2_Activity/ActivityLifecycleWalkthrough.pdf

labs/Lab2_Activity/ActivityNoReconfig.mp4

labs/Lab2_Activity/ActivityReconfig.mp4

labs/Lab2_Activity/Lab-Activity.pdf

labs/Lab2_Activity/app/build.gradle

...urse/labs/activitylab/tests/Test1_StartActivityOneTest.kt

...bs/activitylab/tests/Test2_DoubleRotateActivityOneTest.kt

...urse/labs/activitylab/tests/Test3_StartActivityTwoTest.kt

...bs/activitylab/tests/Test4_DoubleRotateActivityTwoTest.kt

...urse/labs/activitylab/tests/Test5_CloseActivityTwoTest.kt

...rse/labs/activitylab/tests/Test6_ReopenActivityTwoTest.kt

labs/Lab2_Activity/app/src/androidTest/res/.gitkeep

labs/Lab2_Activity/app/src/main/AndroidManifest.xml

.../app/src/main/java/course/labs/activitylab/ActivityOne.kt

.../app/src/main/java/course/labs/activitylab/ActivityTwo.kt

labs/Lab2_Activity/app/src/main/res/layout/activity_one.xml

labs/Lab2_Activity/app/src/main/res/layout/activity_two.xml

...ab2_Activity/app/src/main/res/mipmap-hdpi/ic_launcher.png

...ab2_Activity/app/src/main/res/mipmap-ldpi/ic_launcher.png