Bug 1389420 - [mozilla-release leftovers] Rename android-api-15 to android-api-16 once 56 reaches release r=sfraser

MozReview-Commit-ID: J1sgnaH9j0p

--HG--
extra : rebase_source : 2fb62afc617beb5a512e93de72bd9d2d7fb447dc

testing/mozharness/configs/merge_day/beta_to_release.py

@@ -15,8 +15,7 @@ config = {
         ("{}{}".format(d, f),
         "ac_add_options --with-branding=mobile/android/branding/beta",
         "ac_add_options --with-branding=mobile/android/branding/official")
-        # TODO Bug 1389420: Rename api-15 into api-16 after Firefox 57 made Beta
-        for d in ["mobile/android/config/mozconfigs/android-api-15/",
+        for d in ["mobile/android/config/mozconfigs/android-api-16/",
                   "mobile/android/config/mozconfigs/android-x86/",
                   "mobile/android/config/mozconfigs/android-aarch64/"]
         for f in ["debug", "nightly", "l10n-nightly"]
@@ -24,8 +23,7 @@ config = {
         # File, from, to
         (f, "ac_add_options --with-l10n-base=../../mozilla-beta",
         "ac_add_options --with-l10n-base=../../mozilla-release")
-        # TODO Bug 1389420: Rename api-15 into api-16 after Firefox 57 made Beta
-        for f in ["mobile/android/config/mozconfigs/android-api-15/l10n-nightly",
+        for f in ["mobile/android/config/mozconfigs/android-api-16/l10n-nightly",
                   "mobile/android/config/mozconfigs/android-x86/l10n-nightly",
                   "mobile/android/config/mozconfigs/android-aarch64/l10n-nightly"]
     ] + [