Update README URLs based on HTTP redirects

[ReadmeCritic]

Created with https://github.com/dkhamsing/frankenstein

Corrected URLs

Was	Now
http://code.google.com/p/android-in-practice/	https://code.google.com/archive/p/android-in-practice
http://code.google.com/p/apps-for-android/	https://code.google.com/archive/p/apps-for-android
http://code.google.com/p/unlocking-android/	https://code.google.com/archive/p/unlocking-android
http://www.informit.com/title/9780321673350	http://www.informit.com/store/sams-teach-yourself-android-application-development-9780321673350
http://www.pragprog.com/titles/eband/hello-android	https://pragprog.com/titles/eband/hello-android