Get swipe up onboarding text from launcher

Launcher sends the text when binding to the overview service,
which stores the text for when it needs to be shown.

Also renamed some files and strings to be more generic

Test: install launcher with updated text and ensure it is shown

Bug: 72999860
Change-Id: I5998ab8867754d877f954673e03e5faf44b606ed
diff --git a/packages/SystemUI/src/com/android/systemui/OverviewProxyService.java b/packages/SystemUI/src/com/android/systemui/OverviewProxyService.java
index b7e1d67..b30b0c5 100644
--- a/packages/SystemUI/src/com/android/systemui/OverviewProxyService.java
+++ b/packages/SystemUI/src/com/android/systemui/OverviewProxyService.java
@@ -66,6 +66,7 @@
 
     private IOverviewProxy mOverviewProxy;
     private int mConnectionBackoffAttempts;
+    private CharSequence mOnboardingText;
 
     private ISystemUiProxy mSysUiProxy = new ISystemUiProxy.Stub() {
 
@@ -105,6 +106,10 @@
                 Binder.restoreCallingIdentity(token);
             }
         }
+
+        public void setRecentsOnboardingText(CharSequence text) {
+            mOnboardingText = text;
+        }
     };
 
     private final BroadcastReceiver mLauncherAddedReceiver = new BroadcastReceiver() {
@@ -223,8 +228,8 @@
         return mOverviewProxy;
     }
 
-    public ComponentName getLauncherComponent() {
-        return mLauncherComponentName;
+    public CharSequence getOnboardingText() {
+        return mOnboardingText;
     }
 
     private void disconnectFromLauncherService() {