fix(android): report validated ADB and Apktool host availability

Probe the selected clients through their owning providers and expose current host availability through binary_session. Keep device/serial and target applicability separate. Reject unrecognized successful version output; retain the bounded producer output and original version spelling. Apply the documented Apktool floor, including the verified Debian dirty build.

Validation: provider/version tests and public MCP grouped availability; no real Android device or APK provider verification claimed.

Fixes #3067
Fixes #3068
Related: #3077

Co-authored-by: Taksh <takshkothari09@gmail.com>

src/application/CapabilityInventory.ts

@@ -54,6 +54,8 @@ export type AvailabilityPolicy = {
   readonly firmwareInspectionEnabled?: boolean;
   readonly firmwareExtractionEnabled?: boolean;
   readonly androidAnalysisAvailability?: ProviderAvailability;
+  readonly adbAnalysisAvailability?: ProviderAvailability;
+  readonly apktoolAnalysisAvailability?: ProviderAvailability;
   readonly jebAnalysisAvailability?: ProviderAvailability;
   readonly javascriptRecoveryEnabled?: boolean;
   readonly webModuleResolutionEnabled?: boolean;
@@ -473,6 +475,16 @@ const workflowAvailabilityFor = ({
             policy.androidAnalysisAvailability?.reason ??
             "Set REA_JADX_MCP_JAR to a caller-supplied jadx-headless-mcp 0.7.1 JAR and provide a full JDK on Linux, macOS, or Windows x64 with its matching bundled native controls.",
         };
+  if (kind === "adb-provider")
+    return ownerProbeAvailability(
+      policy.adbAnalysisAvailability,
+      "Set REA_ADB_PATH to a caller-supplied adb executable or make adb available on PATH. This checks the client version only; device and serial availability depend on the request.",
+    );
+  if (kind === "apktool-provider")
+    return ownerProbeAvailability(
+      policy.apktoolAnalysisAvailability,
+      "Set REA_APKTOOL_COMMAND to a caller-supplied Apktool executable or make Apktool 2.7.0 or newer available on PATH.",
+    );
   if (kind === "jeb-provider")
     return policy.jebAnalysisAvailability?.status === "available"
       ? { reason: "available", remediation: null }
@@ -506,6 +518,25 @@ const workflowAvailabilityFor = ({
   return null;
 };
 
+const ownerProbeAvailability = (
+  observation: ProviderAvailability | undefined,
+  missingRemediation: string,
+): Availability => {
+  if (observation === undefined)
+    return { reason: "provider_missing", remediation: missingRemediation };
+  if (observation.status === "available")
+    return { reason: "available", remediation: null };
+  return {
+    reason:
+      observation.code === "unsupported_host"
+        ? "unsupported_host"
+        : observation.code === "not_configured"
+          ? "provider_missing"
+          : "provider_unavailable",
+    remediation: observation.reason,
+  };
+};
+
 const electronProviderAvailability = (
   name: string,
   kind: ToolKind,