Roll src/clank from 478c95ccdd64 to 256c60d47ece

Commits rolled:
https://chrome-internal.googlesource.com/clank/internal/apps.git/+log/478c95ccdd64..256c60d47ece

Generated by: go/bbid/8764447436547642753

Change-Id: I25786467afe40534237367b0fd8b9e6166a93694
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5028079
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/6045@{#1348}
Cr-Branched-From: 905e8bd-refs/heads/main@{#1204232}

DEPS

@@ -845,7 +845,7 @@ deps = {
 
   'src/clank': {
     'url': Var('chrome_git') + '/clank/internal/apps.git' + '@' +
-    '478c95ccdd64d66b2d3e5853746d5c131fc13e1d',
+    '256c60d47ece586fa9097925b0debc3fd6452cd9',
     'condition': 'checkout_android and checkout_src_internal',
   },