generateProjectThumbnail can fail to close output stream

In case of an excpetion the generateProjectThumbnail method
does not close the output stream used.

Move the closing of the stream to the finally block.

Change-Id: I417236ab1acf65bb97e40beb8a750035c25e436e
Fix a variety of small publicly-reported bugs.

Possible NULL dereference in cmds/bootanimation/BootAnimation.cpp.
https://code.google.com/p/android/issues/detail?id=61556

Missing fclose in core/jni/android_os_Debug.cpp.
https://code.google.com/p/android/issues/detail?id=61546

Bad loop guards in core/jni/android_util_Process.cpp.
https://code.google.com/p/android/issues/detail?id=61557

Assignment to wrong variable in libs/androidfw/AssetManager.cpp.
https://code.google.com/p/android/issues/detail?id=61560

Missing delete[]s in libs/androidfw/ObbFile.cpp.
https://code.google.com/p/android/issues/detail?id=61549

Leaks on error in tools/aapt/Images.cpp.
https://code.google.com/p/android/issues/detail?id=61552

Two missing fclose calls in tools/aapt/Resource.cpp.
https://code.google.com/p/android/issues/detail?id=61553

Missing fclose in tools/aidl/aidl.cpp.
https://code.google.com/p/android/issues/detail?id=61554

Change-Id: I5820f3824e72d07a9acb776cf0af3e7443f5694a