Temporarily fix storgae related issues on Android 11

Fix #6 & #7
Ref: https://developer.android.com/about/versions/11/privacy/storage#scoped-storage

Signed-off-by: sunilpaulmathew <sunil.kde@gmail.com>

Author: sunilpaulmathew

app/build.gradle

@@ -17,7 +17,7 @@ android {
     defaultConfig {
         applicationId "com.smartpack.scriptmanager"
         minSdkVersion 23
-        targetSdkVersion 30
+        targetSdkVersion 29
         versionCode 35
         versionName "v4.4"
         vectorDrawables.useSupportLibrary = true
@@ -61,5 +61,5 @@ repositories {
 dependencies {
     playImplementation 'com.android.billingclient:billing:3.0.2'
     implementation "com.github.topjohnwu.libsu:core:3.0.2"
-    implementation 'com.google.android.material:material:1.3.0-beta01'
+    implementation 'com.google.android.material:material:1.3.0-rc01'
 }