refactor(bigtable-snippets): shorten NotFoundException catch blocks in samples and tests

Author: jinseopkim0

java-bigtable/samples/snippets/src/main/java/com/example/bigtable/AuthorizedViewExample.java

@@ -99,7 +99,7 @@ private boolean exists(String tableId) {
               .setView(Table.View.NAME_ONLY)
               .build());
       return true;
-    } catch (com.google.api.gax.rpc.NotFoundException e) {
+    } catch (NotFoundException e) {
       return false;
     }
   }

java-bigtable/samples/snippets/src/main/java/com/example/bigtable/InstanceAdminExample.java

@@ -123,7 +123,7 @@ public void createProdInstance(boolean createWithTags) {
               .setName("projects/" + projectId + "/instances/" + instanceId)
               .build());
       exists = true;
-    } catch (com.google.api.gax.rpc.NotFoundException e) {
+    } catch (NotFoundException e) {
       // ignore
     }
     if (!exists) {

java-bigtable/samples/snippets/src/main/java/com/example/bigtable/SchemaBundleExample.java

@@ -95,7 +95,7 @@ private boolean exists(String tableId) {
               .setView(Table.View.NAME_ONLY)
               .build());
       return true;
-    } catch (com.google.api.gax.rpc.NotFoundException e) {
+    } catch (NotFoundException e) {
       return false;
     }
   }

java-bigtable/samples/snippets/src/test/java/com/example/bigtable/TableAdminExampleTest.java

@@ -63,7 +63,7 @@ private static boolean exists(String tableId) {
               .setView(Table.View.NAME_ONLY)
               .build());
       return true;
-    } catch (com.google.api.gax.rpc.NotFoundException e) {
+    } catch (NotFoundException e) {
       return false;
     }
   }