fix(app,learn,meditate): a device without speech recognition says so, and how to get one

On GrapheneOS, which installs no recogniser, the microphone did nothing
and stayed listening: speech_to_text's initialize throws a
PlatformException (recognizerNotAvailable) there rather than answering
false, and DeviceSpeechInput let it through. A listen now answers how it
went (SpeechStart: listening, noRecognizer, unavailable) and never
throws; Learn's field and Meditate's dream say that no speech
recognition is installed and name two to install (FUTO Voice Input,
Google's speech services), in halkyon_app's texts. It also passes
androidNoBluetooth, as the apps declare no Bluetooth permission the
plugin would otherwise ask for.

Whats-New: Where the device has no speech recognition, the microphone says so and how to get one.
Whats-New-De: Wo das Gerät keine Spracherkennung hat, sagt das Mikrofon das und wie du eine bekommst.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

packages/halkyon_app/lib/l10n/halkyon_app_en.arb

@@ -1583,5 +1583,7 @@
   "publicProfileUnreachable": "Your public profile can't be reached right now.",
   "publicProfileVerifyHint": "A link gets a checkmark once its page links back to your profile page with rel=\"me\", as Mastodon checks links.",
   "profileAccount": "Account",
-  "profileSheetLinkVerified": "Links back to this profile"
+  "profileSheetLinkVerified": "Links back to this profile",
+  "speechNoRecognizer": "This device has no speech recognition installed. Install one, such as FUTO Voice Input or Google's speech services, then try again.",
+  "@speechNoRecognizer": {"description": "Shown when the microphone is tapped on a device without any speech recognition app (as GrapheneOS without Google's services), with a hint how to get one."}
 }