fix(android): set project.ext.minSdkVersion for community modules (#597)

Author: tido64

android/app/build.gradle

@@ -59,8 +59,8 @@ project.ext.react = [
 ]
 
 android {
-    compileSdkVersion sdk.version
-    buildToolsVersion sdk.buildToolsVersion
+    compileSdkVersion project.ext.compileSdkVersion
+    buildToolsVersion project.ext.buildToolsVersion
 
     // We need only set `ndkVersion` when building react-native from source.
     if (hasProperty("ANDROID_NDK_VERSION")) {
@@ -81,8 +81,8 @@ android {
 
     defaultConfig {
         applicationId project.ext.react.applicationId
-        minSdkVersion sdk.minVersion
-        targetSdkVersion sdk.version
+        minSdkVersion project.ext.minSdkVersion
+        targetSdkVersion project.ext.targetSdkVersion
         versionCode reactTestApp.versionCode
         versionName reactTestApp.versionName
 

android/dependencies.gradle

@@ -8,11 +8,10 @@ ext {
         versionName: "1.0"
     ]
 
-    sdk = [
-        version          : 29,
-        minVersion       : 21,
-        buildToolsVersion: "30.0.3"
-    ]
+    compileSdkVersion = 29
+    buildToolsVersion = "30.0.3"
+    minSdkVersion = 21
+    targetSdkVersion = 29
 
     /**
      * Dependabot requires a `dependencies.gradle` to evaluate Java

android/support/build.gradle

@@ -14,12 +14,12 @@ apply from: "$androidDir/force-resolve-trove4j.gradle"
 apply plugin: "com.android.library"
 
 android {
-    compileSdkVersion sdk.version
-    buildToolsVersion sdk.buildToolsVersion
+    compileSdkVersion project.ext.compileSdkVersion
+    buildToolsVersion project.ext.buildToolsVersion
 
     defaultConfig {
-        minSdkVersion sdk.minVersion
-        targetSdkVersion sdk.version
+        minSdkVersion project.ext.minSdkVersion
+        targetSdkVersion project.ext.targetSdkVersion
         versionCode reactTestApp.versionCode
         versionName reactTestApp.versionName
     }