adding firebase lecture CRUD demo

.gitignore

.idea/caches/build_file_checksums.ser

.idea/codeStyles/Project.xml

.idea/gradle.xml

.idea/misc.xml

.idea/runConfigurations.xml

.idea/vcs.xml

app/.gitignore

app/build.gradle

app/google-services.json

app/proguard-rules.pro

...ava/com/example/tesla/myhomelibrary/MainActivityTest.java

app/src/main/AndroidManifest.xml

...src/main/java/com/example/tesla/myhomelibrary/Author.java

.../java/com/example/tesla/myhomelibrary/AuthorActivity.java

...main/java/com/example/tesla/myhomelibrary/AuthorList.java

...in/java/com/example/tesla/myhomelibrary/MainActivity.java

app/src/main/java/com/example/tesla/myhomelibrary/Title.java

.../main/java/com/example/tesla/myhomelibrary/TitleList.java

app/src/main/res/drawable-v24/ic_launcher_foreground.xml