Switch vogar from toolchain=jdk to toolchain=dx

Switch vogar from toolchain=jdk to toolchain=dx because
the name is more meaningful in a world where javac
is used with different Android tools.

Bug: 67934307
Test: None
Change-Id: Ife0e16cdf02aea95fbc88f5861e3ce7de5c0f937
2 files changed