Added LeakCanary library, removed Write_Ext_Storage permission as obsolete

app/build.gradle

@@ -87,5 +87,7 @@ dependencies {
     implementation "org.osmdroid:osmdroid-android:$osmdroid_version"
     implementation "com.github.davidmoten:predict4java:$predict4java_version"
 
+    debugImplementation "com.squareup.leakcanary:leakcanary-android:$leak_canary_version"
+
     testImplementation "junit:junit:$junit_version"
 }

app/src/main/AndroidManifest.xml

@@ -24,7 +24,6 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
     <application
         android:name=".Look4SatApp"