sentry: Disable Sentry again on Android

This reverts commit f792c39, and effectively reinstates
commit e8c57e7.  It's aimed as a workaround for #5778,
which appears to revive #5757.  See chat thread:
  https://chat.zulip.org/#narrow/stream/48-mobile/topic/Android.20crash.20.23M5778/near/1659732

docs/howto/release.md

@@ -102,12 +102,9 @@ simple terminology for the process we follow with both.
   tools/checkout-keystore
   ```
 
-* Apply the Sentry client key (using the local branch created for this
-  in initial setup):
-
-  ```
-  git rebase @ release-secrets
-  ```
+* Do *not* apply the Sentry client key from the `release-secrets`
+  branch; if you're already on that branch (from e.g. making the iOS
+  build), move off of it.  See our issues #5757 and #5766.
 
 * Build the app, as both good old-fashioned APKs and a fancy new AAB:
 

tools/android

@@ -64,14 +64,16 @@ do_apk() {
     check_yarn_link
     run_visibly yarn
 
-    run_visibly tools/gradle :app:assembleRelease -Psigned -Psentry
+    # TODO(#5766): start passing -Psentry again
+    run_visibly tools/gradle :app:assembleRelease -Psigned
 }
 
 do_aab() {
     check_yarn_link
     run_visibly yarn
 
-    run_visibly tools/gradle :app:bundleRelease -Psigned -Psentry
+    # TODO(#5766): start passing -Psentry again
+    run_visibly tools/gradle :app:bundleRelease -Psigned
 }
 
 case "${action}" in