Align PromiseState @IntDef to other @IntDef

Patch is aligning PromiseState to other @IntDef:

1. with @IntDef element first, @Retention second and related @interface third
2. with values inside @interface
3. with @Retention(RetentionPolicy.SOURCE)
4. without "static final" in the @interface

Change-Id: Ia94bbd12a0e4cac0e4a0d504dbd3c24a2a8b10f7
Reviewed-on: https://chromium-review.googlesource.com/c/1370950
Reviewed-by: agrieve <agrieve@chromium.org>
Commit-Queue: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616040}
1 file changed