androidfw: resolve 64-bit build issues

- uid_t/gid_t cast to unsigned long
- unused argument warnings
- tab and space requirements

Change-Id: Ib446d8165b9082be02edb55e6b71fd1a03ea3431
diff --git a/libs/androidfw/Asset.cpp b/libs/androidfw/Asset.cpp
index ce6cc38..589211f 100644
--- a/libs/androidfw/Asset.cpp
+++ b/libs/androidfw/Asset.cpp
@@ -72,7 +72,7 @@
         }
         cur = cur->mNext;
     }
-    
+
     return res;
 }
 
@@ -84,18 +84,18 @@
     mNext = mPrev = NULL;
     if (gTail == NULL) {
         gHead = gTail = this;
-  	} else {
-  	    mPrev = gTail;
-  	    gTail->mNext = this;
-  	    gTail = this;
-  	}
+    } else {
+        mPrev = gTail;
+        gTail->mNext = this;
+        gTail = this;
+    }
     //ALOGI("Creating Asset %p #%d\n", this, gCount);
 }
 
 Asset::~Asset(void)
 {
     AutoMutex _l(gAssetLock);
-	gCount--;
+    gCount--;
     if (gHead == this) {
         gHead = mNext;
     }
@@ -409,7 +409,7 @@
     }
 
     mFileName = fileName != NULL ? strdup(fileName) : NULL;
-    
+
     return NO_ERROR;
 }
 
@@ -538,7 +538,7 @@
         free(mFileName);
         mFileName = NULL;
     }
-    
+
     if (mFp != NULL) {
         // can only be NULL when called from destructor
         // (otherwise we would never return this object)