Allow ShortcutInfo to specify a theme for splash screen.(5/N)

Provides new APIs so that shortcuts can preset the theme of the splash
screen window.
- Static way: android:splashScreenTheme
  Preset the splash screen theme from xml.
- Dynamic way: ShortcutInfo.Builder#setStartingTheme
  Preset the splash screen theme when construct the ShortcutInfo
  programmatically.

Bug: 73289295
Test: build/flash
Test: atest AppWindowTokenTests ActivityRecordTests
Change-Id: Ie5e73f9b22fea22659e496c12198c942f4bc93cd

data/etc/services.core.protolog.json

@@ -889,12 +889,6 @@
       "group": "WM_SHOW_TRANSACTIONS",
       "at": "com\/android\/server\/wm\/WindowSurfaceController.java"
     },
-    "-1088782910": {
-      "message": "Translucent=%s Floating=%s ShowWallpaper=%s",
-      "level": "VERBOSE",
-      "group": "WM_DEBUG_STARTING_WINDOW",
-      "at": "com\/android\/server\/wm\/ActivityRecord.java"
-    },
     "-1076978367": {
       "message": "thawRotation: mRotation=%d",
       "level": "VERBOSE",
@@ -1675,6 +1669,12 @@
       "group": "WM_DEBUG_STATES",
       "at": "com\/android\/server\/wm\/Task.java"
     },
+    "-124316973": {
+      "message": "Translucent=%s Floating=%s ShowWallpaper=%s Disable=%s",
+      "level": "VERBOSE",
+      "group": "WM_DEBUG_STARTING_WINDOW",
+      "at": "com\/android\/server\/wm\/ActivityRecord.java"
+    },
     "-118786523": {
       "message": "Resume failed; resetting state to %s: %s",
       "level": "VERBOSE",