Refactor Android build process to support update-compatible APKs and add shared debug keystore configuration

app/build.gradle

@@ -4,11 +4,21 @@ plugins {
 
 def ciVersionCode = providers.gradleProperty("ciVersionCode").getOrNull()
 def ciVersionName = providers.gradleProperty("ciVersionName").getOrNull()
+def sharedDebugKeystore = file("signing/bible-daily-debug.keystore")
 
 android {
     namespace "com.bibliadiaria.app"
     compileSdk 35
 
+    signingConfigs {
+        sharedDebug {
+            storeFile sharedDebugKeystore
+            storePassword "android"
+            keyAlias "androiddebugkey"
+            keyPassword "android"
+        }
+    }
+
     defaultConfig {
         applicationId "com.bibliadiaria.app"
         minSdk 23
@@ -17,6 +27,14 @@ android {
         versionName ciVersionName != null ? ciVersionName : "1.0"
     }
 
+    buildTypes {
+        debug {
+            if (sharedDebugKeystore.exists()) {
+                signingConfig signingConfigs.sharedDebug
+            }
+        }
+    }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17