Change palm rejection enabling value

It looks like we cache the remote configuration value in some instances,
so we'll resolve this by changing the value we use to enable/disable it,
and also remove the propagation criteria and use "experiments" and
"launches" instead.

Bug: 239675985
Test: flashed device and confirmed that palm rejection is disabled

Change-Id: I9c764ed3402d9244e6dd5928d3ca8388491f7175
diff --git a/services/inputflinger/UnwantedInteractionBlocker.cpp b/services/inputflinger/UnwantedInteractionBlocker.cpp
index a8e495f..38e2c78 100644
--- a/services/inputflinger/UnwantedInteractionBlocker.cpp
+++ b/services/inputflinger/UnwantedInteractionBlocker.cpp
@@ -69,8 +69,8 @@
 static bool isPalmRejectionEnabled() {
     std::string value = toLower(
             server_configurable_flags::GetServerConfigurableFlag(INPUT_NATIVE_BOOT,
-                                                                 PALM_REJECTION_ENABLED, "false"));
-    if (value == "true" || value == "1") {
+                                                                 PALM_REJECTION_ENABLED, "0"));
+    if (value == "1") {
         return true;
     }
     return false;