Add LOCAL_DEX_PREOPT := false to force the samples to build actual apks.
In addition, fix a couple of other small issues:
- TtsEngine didn't have the api level set properly.
- SimpleJNI used a non-ndk library and was using libc++.
Change-Id: I1fd7c187956eed4620049bb746f4d62babcd648a
Move AppNavigation to SupportAppNavigation - this one uses the support
lib navigation helpers.
Add AppNavigation as an implementation of the same sample using the
framework features in JB.
Change-Id: I59e0f2e3e11ccccc277b177aee87bd88da8eb2c6
