Fix static analyzer warnings.

This patch fixes multiple static analyzer warnings:

frameworks/base/media/mca/filterfw/jni/jni_gl_environment.cpp:66:10:
warning: Potential memory leak
frameworks/base/media/mca/filterfw/jni/jni_native_frame.cpp:38:10:
warning: Potential memory leak
frameworks/base/media/mca/filterfw/jni/jni_native_program.cpp:31:10:
warning: Potential memory leak
frameworks/base/media/mca/filterfw/jni/jni_shader_program.cpp:50:12:
warning: Potential memory leak
frameworks/base/media/mca/filterfw/jni/jni_shader_program.cpp:57:12:
warning: Potential memory leak
frameworks/base/media/mca/filterfw/jni/jni_vertex_frame.cpp:27:10:
warning: Potential memory leak

Note that the changes in jni_gl_frame are purely cosmetic; those aren't
fixing any warnings. I'm happy to back them out if anyone wants.

Bug: None.
Test: All of the static analyzer warnings mentioned above are now gone.
Change-Id: I49dc6d7c789233d6497f8bcc766ca66aec72b27b