Update SafDemos sample's gradle

This commit updates the Gradle version of the SafDemos sample.

- Updates the Gradle version to 7.5.
- Updates the AGP version to 7.4.2.
- Updates the Kotlin version to 1.6.21.
- Sets the namespace in the module build file.
- Added exported=true to MainActivity

Author: cartland

SafDemos/app/build.gradle

@@ -45,6 +45,7 @@ android {
     viewBinding {
         enabled = true
     }
+    namespace 'com.android.samples.safdemos'
 }
 
 dependencies {

SafDemos/app/src/main/AndroidManifest.xml

@@ -15,8 +15,7 @@
   ~ limitations under the License.
   -->
 
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.android.samples.safdemos">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
         android:allowBackup="true"
@@ -25,7 +24,9 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity"
+            android:exported="true"
+            >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

SafDemos/build.gradle

@@ -17,14 +17,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.71'
+    ext.kotlin_version = '1.6.21'
     repositories {
         google()
         jcenter()
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.1'
+        classpath 'com.android.tools.build:gradle:7.4.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

SafDemos/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Fri Aug 27 23:32:13 KST 2021
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME