Messaging: Looply home UI and Gradle app module layout

Restructure the tree for Android Studio/Gradle builds and add the iOS-style home experience with pinned conversations, selection chrome, and scroll-aware search padding.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -0,0 +1,22 @@
+*.iml
+.cursor/
+.gradle/
+/local.properties
+/.idea/
+.DS_Store
+/build/
+/captures/
+.externalNativeBuild/
+.cxx/
+app/build/
+modules/*/build/
+modules/*/.git/
+*.apk
+*.ap_
+*.dex
+*.class
+bin/
+gen/
+out/
+tools/messaging_*.png
+tools/stitch-*.txt

app/build.gradle

@@ -0,0 +1,89 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    namespace 'com.android.messaging'
+    compileSdk 35
+
+    defaultConfig {
+        applicationId 'com.android.messaging'
+        minSdk 33
+        targetSdk 34
+        versionCode 10001040
+        versionName '1.0.001'
+        vectorDrawables.useSupportLibrary true
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),
+                    rootProject.file('proguard-release.flags'),
+                    rootProject.file('proguard.flags')
+        }
+        debug {
+            minifyEnabled false
+        }
+    }
+
+    lint {
+        abortOnError false
+    }
+
+    sourceSets {
+        main {
+            manifest.srcFile 'src/main/AndroidManifest.xml'
+            java.srcDirs = ['src/main/java']
+            res.srcDirs = ['src/main/res']
+            assets.srcDirs = ['src/main/assets']
+        }
+    }
+}
+
+dependencies {
+    implementation project(':modules:colorpicker')
+    implementation project(':modules:chips')
+    implementation project(':modules:photoviewer')
+    implementation project(':modules:vcard')
+
+    implementation 'androidx.activity:activity:1.9.3'
+    implementation 'androidx.annotation:annotation:1.8.2'
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+    implementation 'androidx.collection:collection:1.4.4'
+    implementation 'androidx.core:core:1.15.0'
+    implementation 'androidx.exifinterface:exifinterface:1.3.7'
+    implementation 'androidx.fragment:fragment:1.8.5'
+    implementation 'androidx.media:media:1.7.0'
+    implementation 'androidx.palette:palette:1.0.0'
+    implementation 'androidx.preference:preference:1.2.1'
+    implementation 'androidx.recyclerview:recyclerview:1.3.2'
+    implementation 'androidx.viewpager:viewpager:1.0.0'
+    implementation 'com.google.android.material:material:1.12.0'
+    implementation 'com.google.guava:guava:33.3.1-android'
+    implementation 'com.googlecode.libphonenumber:libphonenumber:8.13.50'
+}
+
+def messagingAvdSerial = rootProject.findProperty('messaging.avd.serial') ?: 'emulator-5556'
+def adbExecutable = new File(android.sdkDirectory, 'platform-tools/adb.exe')
+
+tasks.register('installMessaging', Exec) {
+    group = 'install'
+    description = "Install debug APK on ${messagingAvdSerial} only"
+    dependsOn 'assembleDebug'
+    def apk = layout.buildDirectory.file('outputs/apk/debug/app-debug.apk').get().asFile
+    commandLine adbExecutable.absolutePath, '-s', messagingAvdSerial, 'install', '-r', apk.absolutePath
+}
+
+tasks.register('launchMessaging', Exec) {
+    group = 'install'
+    description = "Launch Messaging on ${messagingAvdSerial}"
+    dependsOn 'installMessaging'
+    commandLine adbExecutable.absolutePath, '-s', messagingAvdSerial, 'shell', 'am', 'start',
+            '-n', 'com.android.messaging/.ui.conversationlist.ConversationListActivity'
+}

app/src/main/AndroidManifest.xml

@@ -19,10 +19,6 @@
     package="com.android.messaging"
     android:installLocation="internalOnly">
 
-    <uses-sdk
-        android:minSdkVersion="33"
-        android:targetSdkVersion="34" />
-
     <!-- Application holds CPU wakelock while working in background -->
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <!-- Application needs SMS/MMS permissions -->