Upgrade Compose version to 1.6.0-alpha01

To match the platform prebuilts version.

Also upgrade compile sdk version because new library is compiled at 34.

Bug: 284913888
Test: Gradle Sync
Test: Run Gallery
Change-Id: Id633a168c4aab0c1eefa6392b25f3e143f749b5d
diff --git a/packages/SettingsLib/Spa/build.gradle.kts b/packages/SettingsLib/Spa/build.gradle.kts
index 64b67d7..e76139f 100644
--- a/packages/SettingsLib/Spa/build.gradle.kts
+++ b/packages/SettingsLib/Spa/build.gradle.kts
@@ -25,13 +25,13 @@
 }
 
 allprojects {
-    extra["jetpackComposeVersion"] = "1.4.0-beta01"
+    extra["jetpackComposeVersion"] = "1.6.0-alpha01"
 }
 
 subprojects {
     plugins.withType<AndroidBasePlugin> {
         configure<BaseExtension> {
-            compileSdkVersion(33)
+            compileSdkVersion(34)
 
             defaultConfig {
                 minSdk = 21