sample-bluetooth-le-gattserver: clean up manifest

- remove backup attributes
- remove icon and theme
- remove extra spaces
- add PIO permission

Bug: 77575481
Bug: 77478121
Change-Id: Ia05159ceaced151e3404b6d1ca721d218c883802

Author: proppy

java/app/src/main/AndroidManifest.xml

@@ -16,16 +16,11 @@
   -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.example.androidthings.gattserver">
-
     <uses-permission android:name="android.permission.BLUETOOTH"/>
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
-
-    <application
-        android:allowBackup="true"
-        android:icon="@android:drawable/sym_def_app_icon"
-        android:label="@string/app_name"
-        android:theme="@android:style/Theme.DeviceDefault.Light">
+    <application android:label="@string/app_name">
         <activity android:name=".GattServerActivity">
+
             <!-- Launch as default from Android Studio -->
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
@@ -45,5 +40,4 @@
 -->
         </activity>
     </application>
-
 </manifest>

kotlin/app/src/main/AndroidManifest.xml

@@ -16,16 +16,11 @@
   -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.example.androidthings.gattserver">
-
     <uses-permission android:name="android.permission.BLUETOOTH"/>
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
-
-    <application
-        android:allowBackup="true"
-        android:icon="@android:drawable/sym_def_app_icon"
-        android:label="@string/app_name"
-        android:theme="@android:style/Theme.DeviceDefault.Light">
+    <application android:label="@string/app_name">
         <activity android:name=".GattServerActivity">
+
             <!-- Launch as default from Android Studio -->
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
@@ -45,5 +40,4 @@
 -->
         </activity>
     </application>
-
 </manifest>