Fixes for backups for Android. Fixes for send almost all amount.

android/app/build.gradle

@@ -31,7 +31,7 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 29
 
     lintOptions {
         disable 'InvalidPackage'

android/app/src/main/AndroidManifest.xml

@@ -4,12 +4,14 @@
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.USE_FINGERPRINT"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
 
     <application
         android:label="Cake Wallet"
         android:allowBackup="false"
         android:fullBackupContent="false"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:requestLegacyExternalStorage="true">
         <activity
             android:name=".MainActivity"
             android:launchMode="singleTop"