SF: use 'base::GetBoolProperty'

Simple clean-up, as I was in the area.

Test: manual - check that the cache is still being generated
Change-Id: I4e1ab726064cdfa45d7adbd321d0647bab4507b6
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index e08690a..1ea4bcd 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -864,9 +864,7 @@
 
     mPowerAdvisor->init();
 
-    char primeShaderCache[PROPERTY_VALUE_MAX];
-    property_get("service.sf.prime_shader_cache", primeShaderCache, "1");
-    if (atoi(primeShaderCache)) {
+    if (base::GetBoolProperty("service.sf.prime_shader_cache"s, true)) {
         if (setSchedFifo(false) != NO_ERROR) {
             ALOGW("Can't set SCHED_OTHER for primeCache");
         }