Enable minify optimizations for release builds (#1437)

## Description
Enables minify & resource shrinking for release builds. This should
improve overall performance a bit. It also decreases the apk size by
~15%.

Also updates AGP

### Related issues
N/A

### Testing
Emulator, but needs more testing before a final release

## Screenshots
N/A

## AI or LLM usage
None

app/build.gradle.kts

@@ -82,7 +82,8 @@ configure<ApplicationExtension> {
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
+            isShrinkResources = true
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro",
@@ -105,6 +106,7 @@ configure<ApplicationExtension> {
 
         debug {
             isMinifyEnabled = false
+            isShrinkResources = false
             isDebuggable = true
             applicationIdSuffix = ".debug"
         }