Adjust "Compiler compliance" error to be more useful.

Adjust "Compiler compliance" error to be more useful.

Changed the compiler compliance check to:
- Indicate the current invalid value (good for bug reports too),
- Indicate both 5.0 and 6.0 (aka 1.5 and 1.6) are supported,
- Explicitely name the menu item that can fix the situation
(it wasn't clear the current suggestion was the menu item name
as it looked just like a regular sentence.)

SDK Bug: http://code.google.com/p/android/issues/detail?id=16512

Change-Id: I2ee295ba37af5b15a27b288ba807e6f4964ef632