feat(ft8): 4.5.5 integrate FT8CN 0.93 (full port, original UI)

Full FT8 mode integration (user chose scope C: complete port, keep
original visual style):

- feature/ft8 module: 213 Java classes from FT8CN 0.93 source
  (com.bg7yoz.ft8cn namespace preserved so code needs zero changes),
  DataBinding enabled, BuildConfig fields (APPLICATION_ID/VERSION_NAME/
  apkBuildTime) restored for AGP9
- libft8cn.so from the user's FT8CN_0.93 APK (armeabi-v7a, 1.53MB;
  differs from repo copy, APK version used)
- 237 res files + 58 assets + 4 local libs (MPAndroidChart spectrum,
  commons-net, nanohttpd, osmdroid map) copied verbatim
- Proguard keep rules for JNI classes (RegisterNatives)
- Entry: More menu "FT8" (default sub menu, after AMSAT) launches
  MainActivity via Intent (external activity, LAUNCHER filter removed
  to avoid double launcher)
- Manifest merged via module (RECORD_AUDIO/BT/location perms)
- Version 4.5.5/455 + What's new 5 languages (REPLACED per rule)
Verified: :feature:ft8:compileDebugJavaWithJavac + :app:compileDebugKotlin
BUILD SUCCESSFUL; check_strings 9 files OK.

feature/ft8/src/main/AndroidManifest.xml

@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- 因需要录音和文件存储功能，所以需要申请录音和存储权限 -->
+    <uses-permission android:name="android.permission.RECORD_AUDIO" /> <!-- 存储数据权限 -->
+    <!-- <uses-permission -->
+    <!-- android:name="android.permission.WRITE_EXTERNAL_STORAGE" -->
+    <!-- tools:ignore="ScopedStorage" /> -->
+    <!-- 允许程序访问CellID或WiFi热点来获取粗略的位置 -->
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <!-- 用于访问GPS定位 -->
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <uses-permission
+        android:name="android.permission.BLUETOOTH"
+        android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-permission
+        android:name="android.permission.BLUETOOTH_ADMIN"
+        android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+
+    <application
+        android:allowBackup="true"
+        android:usesCleartextTraffic="true"
+        android:icon="@drawable/ft8cn_icon"
+        android:label="@string/app_name"
+        android:roundIcon="@drawable/ft8cn_icon"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Ft8CN">
+        <activity
+            android:name=".grid_tracker.GridTrackerMainActivity"
+            android:screenOrientation="sensorLandscape"
+            android:exported="false">
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+        <activity
+            android:name=".FAQActivity"
+            android:exported="false" />
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTask">
+
+            <intent-filter>
+                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
+            </intent-filter>
+            <!-- 关联启动文件 -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:pathPattern=".*\\.txt" />
+                <data android:pathPattern=".*\\..*\\.txt" />
+                <data android:pathPattern=".*\\..*\\..*\\.txt" />
+                <data android:pathPattern=".*\\..*\\..*\\..*\\.txt" />
+
+                <data android:pathPattern=".*\\.adi" />
+                <data android:pathPattern=".*\\..*\\.adi" />
+                <data android:pathPattern=".*\\..*\\..*\\.adi" />
+                <data android:pathPattern=".*\\..*\\..*\\..*\\.adi" />
+
+                <data android:mimeType="text/plain" />
+                <data android:mimeType="application/octet-stream" />
+                <data android:mimeType="*/*" />
+            </intent-filter>
+            <meta-data
+                android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
+                android:resource="@xml/device_filter" />
+        </activity>
+
+        <service android:name=".bluetooth.BluetoothSerialService" />
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="com.bg7yoz.ft8cn.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/filepaths" />
+        </provider>
+    </application>
+
+</manifest>